Examkin

Modifier Placement

28 questions

All types28Multiple choice15Ordering7Fill in the blank6
Question 1Question →

Read the passage below:

In 1610, Galileo Galilei directed his newly constructed telescope toward the night sky, revealing Jupiter’s four largest moons. By recording their positions night after night in his leather-bound journal, these celestial bodies were proved to be orbiting a body other than Earth. This groundbreaking discovery directly challenged the geocentric model that had dominated European astronomy for centuries.

Which choice most effectively corrects the underlined portion to ensure the sentence is clear, logical, and grammatically correct?

Show answer & explanation

Answer: By recording their positions night after night in his leather-bound journal, Galileo proved that these celestial bodies were orbiting a body other than Earth.

Answer

The correct answer is the option that reads: 'By recording their positions night after night in his leather-bound journal, Galileo proved that these celestial bodies were orbiting a body other than Earth.'
The correct option is the one that introduces the subject 'Galileo' immediately after the introductory phrase 'By recording their positions night after night in his leather-bound journal'. This placement resolves the dangling modifier because Galileo is the person who recorded the observations. Additionally, this option maintains subject-verb agreement by correctly pairing the plural subject 'celestial bodies' with the plural verb 'were orbiting', and uses correct punctuation.

Step-by-Step Solution

1
Analyze the underlined portion in the context of the sentence to identify any modifier errors.
The introductory phrase 'By recording their positions night after night in his leather-bound journal' describes the action of recording observations. However, the subject of the main clause immediately following this phrase is 'these celestial bodies.' Because celestial bodies cannot write in a journal, this is a dangling modifier error.
An introductory modifying phrase must logically modify the subject that immediately follows the comma.
2
Evaluate the first choice ('NO CHANGE').
This choice retains the dangling modifier 'By recording... these celestial bodies were proved', which is grammatically incorrect.
It fails to align the modifying phrase with its logical subject (Galileo).
3
Evaluate the option with the intervening relative clause ('By recording their positions night after night in his leather-bound journal, Galileo proved that these celestial bodies, which challenged ancient theories, was orbiting a body other than Earth.').
This option corrects the dangling modifier by introducing 'Galileo' as the subject, but it introduces a subject-verb agreement error. The plural subject 'celestial bodies' is paired with the singular verb 'was orbiting' across the intervening nonessential clause 'which challenged ancient theories'.
A plural subject must agree with a plural verb regardless of any intervening descriptive phrase.
4
Evaluate the option that creates two independent clauses ('He recorded their positions night after night in his leather-bound journal, Galileo proved that these celestial bodies were orbiting a body other than Earth.').
This choice resolves the dangling modifier by creating two complete thoughts, but it joins them with only a comma, creating a comma splice error.
Two independent clauses cannot be joined by a comma alone without a coordinating conjunction or proper punctuation like a semicolon.
5
Evaluate the correct option ('By recording their positions night after night in his leather-bound journal, Galileo proved that these celestial bodies were orbiting a body other than Earth.').
This option correctly associates the introductory phrase with the subject 'Galileo' and maintains proper subject-verb agreement ('bodies' with 'were orbiting') and correct punctuation.
It resolves the dangling modifier without introducing any secondary grammatical errors.

Key Concept

Modifier Placement
Estimated Time:1m 30s
Question 2Question →

Arrange the following segments to construct a grammatically correct sentence that avoids any misplaced or dangling modifiers.

Drag items to arrange them in the correct order

Show answer & explanation

Answer

The correct order of segments is 'Cluttered with old magazines,' followed by 'the desk', then 'was finally cleaned', and ending with 'by Sarah.'
The correct order places the introductory modifying phrase 'Cluttered with old magazines,' directly before 'the desk', which is the noun it logically modifies. This is followed by the verb phrase 'was finally cleaned' and the prepositional phrase 'by Sarah.'

Step-by-Step Solution

1
Identify the introductory modifying phrase.
'Cluttered with old magazines,' is a participial phrase that describes an object.
Recognizing the modifier helps determine what noun must follow it.
2
Identify the noun that is logically described by the modifier.
'the desk' is the object that can be cluttered with magazines, whereas Sarah cannot.
Placing the correct noun immediately after the introductory phrase avoids a dangling modifier.
3
Complete the predicate of the sentence.
Connect the subject 'the desk' to the verb phrase 'was finally cleaned' and the agent 'by Sarah.'
This establishes a grammatically complete, passive-voice sentence.

Key Concept

An introductory modifying phrase must be placed immediately next to the noun it logically modifies to avoid a dangling modifier.
Question 3Question →

After working in the garden all afternoon, Elena's knees were sore. She sat on the porch to rest. Her mother brought her a glass of lemonade.

Which choice is the most grammatically correct version of the underlined portion?

Show answer & explanation

Answer: Elena felt sore in her knees

Answer

Elena felt sore in her knees
The correct answer fixes the dangling modifier by placing the person who was gardening, 'Elena,' immediately after the introductory phrase. This makes the sentence logical and grammatically correct.

Step-by-Step Solution

1
Analyze the introductory modifying phrase to identify the action described and determine who or what logically performs that action.
The phrase 'After working in the garden all afternoon' describes an action that must be performed by a person.
An introductory participial phrase must modify the subject of the clause that immediately follows it.
2
Check the subject of the original sentence to see if it matches the logical performer of the action.
The original subject is 'Elena's knees,' which is illogical because knees cannot work in a garden.
Keeping this subject results in a dangling modifier error.
3
Evaluate the choices to find the one that places 'Elena' as the subject of the main clause while maintaining proper grammar and punctuation.
The option beginning with 'Elena felt sore' fixes the modifier placement, is punctuated correctly, and maintains singular subject-verb agreement.
This corrects the dangling modifier without introducing other grammar errors like comma splices or subject-verb disagreement.

Key Concept

Modifier Placement
Question 4Question →

Complete the sentence by choosing the correct subject, 'Juliet' or 'Juliet's eyes', so that the modifying phrase 'Scanning the night sky' logically describes the subject. Type your choice exactly as shown.

Fill in the blanks below

Scanning the night sky, found the North Star.
Show answer & explanation

Answer

Juliet
The introductory modifying phrase 'Scanning the night sky' describes an action. The subject that immediately follows the comma must be the entity performing that action. Since Juliet is the person scanning the sky, 'Juliet' is the correct subject. This creates a logical and grammatically correct sentence.

Step-by-Step Solution

1
Identify the introductory modifying phrase.
The introductory modifying phrase is 'Scanning the night sky'.
This phrase sets up an action that must be logically performed by the subject of the main clause.
2
Determine the logical subject that performs the action of scanning.
The person (Juliet) is the one scanning the sky, not her eyes.
A person scans the sky using their eyes, but grammatically, the modifier must point to the person as the active agent.
3
Select the option that places the logical subject immediately after the comma.
The subject 'Juliet' is placed in the blank.
Placing 'Juliet' directly after the modifying phrase avoids a dangling modifier.

Key Concept

Modifier Placement
Question 5Question →

Carefully scraping away layers of yellowed varnish, the vibrant original colors of the portrait were revealed by the art conservator. The painting, which had been hidden for over a century, once again looked as the artist intended. Visitors to the museum can now appreciate its true beauty.

Which of the following choices best replaces the underlined portion of the sentence to ensure that the sentence is grammatically correct and logically structured?

Show answer & explanation

Answer: the art conservator revealed the vibrant original colors of the portrait

Answer

The correct answer is the option that places the logical subject, 'the art conservator,' immediately after the introductory modifier, resulting in: 'the art conservator revealed the vibrant original colors of the portrait.'
The correct answer is the option that begins with 'the art conservator.' Because the introductory phrase 'Carefully scraping away layers of yellowed varnish' describes an action, the noun immediately following it must be the person or entity performing that action. A conservator can scrape varnish, whereas colors cannot. Therefore, placing 'the art conservator' directly after the comma resolves the dangling modifier.

Step-by-Step Solution

1
Identify the introductory modifying phrase.
The phrase is 'Carefully scraping away layers of yellowed varnish.'
This phrase contains a participle ('scraping') and describes an action, meaning it must modify the noun that performs that action.
2
Determine who or what is performing the action of 'scraping.'
The art conservator is scraping the varnish, not the vibrant original colors.
An inanimate object like 'colors' cannot scrape varnish, so placing 'colors' immediately after the modifier creates a dangling modifier.
3
Select the option that places the correct subject immediately after the comma without introducing new errors.
The phrase 'the art conservator revealed the vibrant original colors of the portrait' is correct.
It correctly identifies 'the art conservator' as the subject and maintains grammatical correctness throughout the sentence.

Key Concept

Modifier Placement
Question 6Question →

How should the following segments be ordered to construct a clear, grammatically correct sentence that avoids misplaced modifiers?

Drag items to arrange them in the correct order

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Answer

While walking to the local library, Maya found a lost wallet lying on the sidewalk.
The correct sentence structure starts with the introductory modifier 'While walking to the local library,' which is immediately followed by the logical subject 'Maya'. The main clause 'found a lost wallet' is then completed by the modifying phrase 'lying on the sidewalk', which correctly describes the wallet.

Step-by-Step Solution

1
Identify the introductory modifying phrase.
The phrase 'While walking to the local library,' describes a temporary action.
Introductory phrases must be followed immediately by the actor performing the action to prevent a dangling modifier.
2
Determine the subject of the action and place it next.
Place 'Maya' directly after the comma.
Since Maya is the one walking, placing her name here establishes her as the logical subject of the introductory modifier.
3
Add the main verb and direct object.
Follow the subject with 'found a lost wallet'.
This establishes the main action and object of the sentence.
4
Position the remaining modifier.
Attach 'lying on the sidewalk.' at the end.
Placing this modifying phrase next to 'wallet' clearly shows that the wallet, not Maya, was lying on the sidewalk.

Key Concept

Introductory modifiers must immediately precede the noun they describe, and modifying phrases within a sentence must be placed as close as possible to the nouns they modify to ensure clarity.
Question 7Question →

The following passage is an excerpt from a science history article.

In the late nineteenth century, paleontologists unearthed the fossilized remains of an ancient dinosaur. Having spent months excavating the dry desert basin, the discovery of the pristine skull thrilled the lead researcher. This finding would help redefine the understanding of the Cretaceous period.

Which choice is the best revision of the underlined portion?

Show answer & explanation

Answer: the lead researcher was thrilled by the discovery of the pristine skull.

Answer

the lead researcher was thrilled by the discovery of the pristine skull.
The introductory participial phrase 'Having spent months excavating the dry desert basin' describes an action that must logically be performed by a person. The option that places the logical subject, 'the lead researcher,' immediately after the introductory phrase corrects the dangling modifier without introducing other grammatical errors.

Step-by-Step Solution

1
Identify the introductory phrase.
The phrase is 'Having spent months excavating the dry desert basin.'
This phrase functions as an adjective modifying the noun that immediately follows it.
2
Determine the logical subject of the introductory phrase.
The subject who spent months excavating must be 'the lead researcher.'
An inanimate concept like 'the discovery' or 'the discovery of the skull' cannot perform the action of excavating a basin.
3
Choose the option that positions the logical subject directly after the comma.
The correct option must start the main clause with 'the lead researcher' without introducing punctuation errors.
This structure ensures the modifier is placed correctly next to the noun it describes, avoiding a dangling modifier.

Key Concept

Modifier Placement
Estimated Time:45s
Question 8Question →

Read the passage below. To ensure the sentence is grammatically correct and avoids misplaced or dangling modifiers, which of the following phrases should be used to fill in the blank?

Choices:
- 'the researchers discovered a cluster of glowing mycelium'
- 'a cluster of glowing mycelium was discovered by the researchers'
- 'the researchers, who was searching for new species, discovered a cluster of glowing mycelium'
- 'which allowed the researchers to discover a cluster of glowing mycelium'

Fill in the blanks below

Bioluminescent fungi glow in the dark to attract insects that disperse their spores. While trekking through the damp Olympic Peninsula at night, clinging to a decaying hemlock log.
Show answer & explanation

Answer

The correct phrase to fill in the blank is 'the researchers discovered a cluster of glowing mycelium' because it establishes the researchers as the logical subject performing the action of trekking, avoiding a dangling modifier, while maintaining grammatical correctness.
The phrase 'the researchers discovered a cluster of glowing mycelium' is correct because the subject 'the researchers' logically aligns with the introductory modifier 'While trekking through the damp Olympic Peninsula at night.' It also forms a complete, independent clause without any grammatical errors.

Step-by-Step Solution

1
Identify the action and subject of the introductory modifying clause.
The introductory clause is 'While trekking through the damp Olympic Peninsula at night.' The action is 'trekking,' which requires a person or group of people as the logical subject.
An introductory modifying phrase must clearly and logically describe the subject that immediately follows it.
2
Eliminate choices that create a dangling modifier.
The phrases 'a cluster of glowing mycelium was discovered by the researchers' and 'glowing mycelium was discovered...' place the mycelium immediately after the comma, illogically suggesting that the fungi were trekking through the forest.
This error is known as a dangling modifier, as the true subject of the modifier is misplaced or absent from the main clause.
3
Evaluate the remaining options for other grammatical errors.
The phrase 'the researchers, who was searching for new species, discovered a cluster of glowing mycelium' contains a subject-verb agreement error ('researchers... was'). The phrase 'which allowed the researchers to discover...' turns the main clause into a relative clause, creating a sentence fragment.
A grammatically correct sentence must have agreement between subjects and verbs, and it must contain at least one independent clause.

Key Concept

Modifier Placement
Question 9Question →

While cataloging the fragments of the newly unearthed clay tablets, the ancient script was finally deciphered by the linguist using a comparative database. This breakthrough shed light on the economic transactions of the early Bronze Age. Consequently, historians have had to revise their theories regarding regional trade networks.

Which of the following options, if substituted for the underlined portion of the passage, produces a sentence that is grammatically correct and logically coherent?

Show answer & explanation

Answer: the linguist finally deciphered the ancient script by using a comparative database.

Answer

the linguist finally deciphered the ancient script by using a comparative database.
The correct option correctly places the subject performing the action of cataloging—namely, the linguist—immediately after the introductory phrase. This resolves the dangling modifier. It also avoids introducing any additional errors in subject-verb agreement or sentence structure.

Step-by-Step Solution

1
Identify the introductory modifying phrase and determine the logical subject.
The phrase 'While cataloging the fragments of the newly unearthed clay tablets' requires a subject that is capable of cataloging fragments, which must be a person (the linguist).
Introductory participial phrases must modify the subject of the main clause immediately following them.
2
Evaluate the choices to find which one puts the correct subject first.
The options starting with 'the linguist' correctly resolve the dangling modifier.
This eliminates the dangling modifier present in the original sentence.
3
Check the remaining options for other grammatical errors.
One option contains a subject-verb agreement error ('collection... are'), and another contains a comma splice. The option ending in 'by using a comparative database' is grammatically correct.
Eliminating options with structural or agreement errors leaves the only grammatically correct and logical option.

Key Concept

Modifier Placement
Estimated Time:1m 30s
Question 10Question →

Arrange the following segments to construct a clear, grammatically correct sentence that avoids misplaced and dangling modifiers.

Drag items to arrange them in the correct order

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Answer

Having analyzed the tree rings of ancient bristlecone pines, climatologists reconstructed with remarkable precision regional temperature fluctuations that occurred over the past two millennia.
The correct order builds a logical and grammatically sound sentence where each modifier is positioned adjacent to its target. The introductory phrase is followed by the subject 'climatologists' (avoiding a dangling modifier), the adverbial modifier 'with remarkable precision' is kept next to the verb 'reconstructed', and the relative clause is kept next to the noun 'fluctuations'.

Step-by-Step Solution

1
Identify the introductory modifying phrase.
The phrase 'Having analyzed the tree rings of ancient bristlecone pines,' is identified as an introductory modifier.
This phrase describes an action and requires a logical subject to follow it directly.
2
Determine the logical subject that performed the action.
The subject 'climatologists' is the actor, so the segment 'climatologists reconstructed with remarkable precision' must follow the introductory phrase.
Placing the subject immediately after the introductory modifier avoids a dangling modifier.
3
Identify the direct object and its modifier.
The direct object is 'regional temperature fluctuations,' which is modified by the clause 'that occurred over the past two millennia.'
The direct object must follow the verb, and the relative clause must immediately follow the noun it modifies to avoid a misplaced modifier.

Key Concept

Modifiers must be placed next to the words they modify. Introductory participial phrases must be followed by the subject performing the action to avoid dangling modifiers. Adjectival clauses and prepositional phrases must be adjacent to their target nouns or verbs to avoid misplaced modifiers.
Estimated Time:1m 30s
Question 11Question →

Read the passage below:

Exploring the benthic zone of the Mariana Trench, the autonomous vehicle captured footage of a bizarre, previously undocumented siphonophore. [1] Hovering near a hydrothermal vent, the scientists were amazed by the creature's bioluminescent display. [2] This display served not only as a warning to predators but also as a lure for prey.

Which of the following options is the best replacement for the underlined portion in sentence [1]?

Show answer & explanation

Answer: Hovering near a hydrothermal vent, the creature amazed the scientists with its bioluminescent display.

Answer

Hovering near a hydrothermal vent, the creature amazed the scientists with its bioluminescent display.
The correct choice resolves the dangling modifier by placing the logical subject ('the creature') directly after the introductory modifier ('Hovering near a hydrothermal vent'). This clearly conveys that the creature was the one hovering near the vent, and the clause contains no secondary grammatical errors.

Step-by-Step Solution

1
Identify the introductory modifying phrase and its logical target.
The phrase is 'Hovering near a hydrothermal vent'. Logically, it must describe the creature (the siphonophore) rather than the scientists.
Introductory participial phrases must immediately precede the noun they modify to prevent dangling modifiers.
2
Evaluate the choices to find which one puts the correct subject immediately after the modifier.
The options starting with 'the creature' (the correct subject) fix the modifier issue, while the original phrasing keeps 'the scientists' as the subject, which is incorrect.
Since the scientists were not hovering near the vent, the original phrasing is dangling.
3
Check the grammatically modified options for secondary errors like punctuation or agreement issues.
The choice ending with 'they had never seen...' contains a comma splice. The choice containing 'are amazing' contains a subject-verb agreement error. The choice ending with 'with its bioluminescent display' is grammatically correct and concise.
ACT distractors often fix the primary error but introduce a secondary grammatical error.

Key Concept

Modifier Placement
Question 12Question →

A conservation center recently announced a major milestone in its endangered species program. In what sequence must the following segments be arranged to construct a grammatically correct second sentence that avoids misplaced and dangling modifiers?

Drag items to arrange them in the correct order

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Answer

Although nearly extinct in the wild, the Siberian tiger, which has since been released back into its natural habitat, was successfully bred by the zoologists in a specialized conservation facility.
The correct sequence places the introductory modifier 'Although nearly extinct in the wild' next to its logical target, 'the Siberian tiger'. It then correctly positions the relative clause ', which has since been released back into its natural habitat,' immediately after 'the Siberian tiger' to avoid a misplaced modifier. The sentence is completed by the main predicate 'was successfully bred by the zoologists in a specialized conservation facility.'

Step-by-Step Solution

1
Identify the introductory modifying phrase and its logical target.
The phrase 'Although nearly extinct in the wild' must modify the subject 'the Siberian tiger'.
Placing any other noun (like 'the zoologists' or 'conservation facility') immediately after this phrase would create a dangling modifier, as people or buildings cannot be extinct species.
2
Determine the correct placement of the relative clause.
The relative clause ', which has since been released back into its natural habitat,' must be placed directly after 'the Siberian tiger'.
If placed elsewhere, such as after 'conservation facility' or 'zoologists', it would create a misplaced modifier, implying the facility or the researchers were released into the wild.
3
Arrange the remaining elements of the main independent clause.
Combine the subject 'the Siberian tiger' with the verb phrase 'was successfully bred by the zoologists' and the location 'in a specialized conservation facility.'
This logical sequence ensures the main action of the sentence is clear and grammatically correct.

Key Concept

Modifier Placement
Question 13Question →

Located deep inside a sandstone mountain on a remote Arctic island, the Svalbard Global Seed Vault's primary mission is to preserve millions of crop samples. This facility serves as a global safety net against the loss of biodiversity during large-scale crises. By housing duplicates of seeds from around the world, scientists hope to safeguard the future of the global food supply.

Which of the following choices is the most grammatically correct replacement for the underlined portion of the passage?

Show answer & explanation

Answer: the vault preserves millions of crop samples as its primary mission

Answer

the vault preserves millions of crop samples as its primary mission
The correct option resolves the dangling modifier by placing the noun being modified immediately after the introductory phrase. It also maintains proper subject-verb agreement and clause connection.

Step-by-Step Solution

1
Identify the introductory modifier and its logical target.
The modifying phrase 'Located deep inside a sandstone mountain on a remote Arctic island' describes a physical structure (the vault), not an abstract concept (the mission).
Introductory modifiers must clearly and logically modify the subject that immediately follows them.
2
Evaluate the grammatical structure of the choices that correct the modifier.
The choices starting with 'the vault' correctly place the noun modified by the introductory phrase. However, some of these choices introduce new errors.
Correcting one grammatical error must not introduce another, such as punctuation or agreement issues.
3
Check for punctuation and agreement errors among the remaining options.
The option containing a comma splice and the option with the plural verb are eliminated.
Independent clauses cannot be joined solely by a comma, and singular subjects must agree with singular verbs.

Key Concept

Introductory Modifier Placement
Question 14Question →

Read the passage below. Fill in the blank with the correct phrase from the list of options to ensure the sentence is grammatically correct and avoids modifier placement errors.

Options:
- "the delicate tapestries were hung by curators in the lower gallery, where light levels are strictly controlled"
- "museum curators hung the delicate tapestries in the lower gallery, where light levels are strictly controlled"
- "the delicate tapestries was hung by curators in the lower gallery, where light levels are strictly controlled"
- "the delicate tapestries were hung by curators in the lower gallery, they controlled the light levels strictly"

Which phrase correctly completes the sentence?

Fill in the blanks below

The historic archive contains centuries-old textile artifacts that are highly sensitive to solar radiation. To prevent fading from ultraviolet rays, . This preservation strategy ensures that future generations can study these rare historical items.
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Answer

the delicate tapestries were hung by curators in the lower gallery, where light levels are strictly controlled
The correct phrase is 'the delicate tapestries were hung by curators in the lower gallery, where light levels are strictly controlled'. The introductory modifying phrase 'To prevent fading from ultraviolet rays' must logically modify the subject of the main clause that follows it. Since the tapestries are what needs protection from fading, 'the delicate tapestries' must serve as the subject. This phrase is grammatically correct because the plural subject 'tapestries' agrees with the plural verb 'were', and the dependent clause is properly linked with a relative pronoun rather than creating a comma splice.

Step-by-Step Solution

1
Analyze the introductory phrase to determine what it must logically modify.
The phrase 'To prevent fading from ultraviolet rays' describes a process that must apply to the subject of the following main clause.
An introductory modifying phrase must modify the subject that immediately follows the comma to avoid a dangling modifier.
2
Identify the logical subject of the sentence.
The tapestries are what need protection from fading, not the curators. Thus, the main clause must begin with 'the delicate tapestries'.
Placing 'museum curators' as the subject creates a dangling modifier, which illogically suggests that the curators themselves are being prevented from fading.
3
Evaluate the remaining options starting with 'the delicate tapestries' for grammatical correctness.
The option containing 'was hung' is incorrect due to a subject-verb agreement error. The option ending with 'gallery, they controlled the light levels strictly' is incorrect because it creates a comma splice.
The correct option must resolve the modifier placement issue without introducing other grammatical errors.

Key Concept

Modifier Placement
Question 15Question →

Art restorers have recently turned to nanocalcite gels to consolidate fragile Renaissance frescoes. Applied to the painted surface in thin layers, the crumbling plaster is reinforced by microscopic calcium carbonate particles. This innovative method preserves the vibrant colors without altering the chemical composition of the original artwork.

Which of the following versions of the underlined portion is grammatically correct and best maintains the logical flow of the sentence?

Show answer & explanation

Answer: Applied in thin layers to the painted surface, the microscopic calcium carbonate particles reinforce the crumbling plaster.

Answer

The correct answer is the option stating that the microscopic calcium carbonate particles reinforce the crumbling plaster, which correctly aligns the introductory modifier with its logical subject and maintains subject-verb agreement.
The correct option is the one stating 'Applied in thin layers to the painted surface, the microscopic calcium carbonate particles reinforce the crumbling plaster.' This version correctly repositions the logical subject 'particles' immediately after the introductory modifier. It also maintains proper subject-verb agreement by pairing the plural subject 'particles' with the plural verb 'reinforce' and forms a complete, independent clause.

Step-by-Step Solution

1
Identify the introductory modifier in the underlined portion and determine what it logically describes.
The phrase 'Applied to the painted surface in thin layers' describes the gel or its particles, not 'the crumbling plaster.'
An introductory participial modifier must immediately precede the noun it logically modifies to avoid a dangling modifier.
2
Evaluate the options to find one where the correct noun ('the microscopic calcium carbonate particles') is the subject immediately following the introductory modifier.
The options starting with 'the microscopic calcium carbonate particles' place the correct noun after the comma.
This resolves the dangling modifier by aligning the modifier with its logical target.
3
Verify subject-verb agreement and complete sentence structure in the remaining options.
The correct option uses the plural verb 'reinforce' to match the plural subject 'particles' and forms a complete, independent clause.
Ensuring other grammatical conventions (like subject-verb agreement and sentence structure) are intact is necessary to confirm the best answer.

Key Concept

Modifier Placement
Estimated Time:1m 0s
Question 16Question →

Early audio engineers recorded sound onto hollow wax cylinders, capturing the voices of historical figures. Having degraded over the last century, specialists now use optical scanners to play back the audio without touching the fragile wax. This technology ensures that these unique recordings are preserved for future generations.

Which of the following options is the best replacement for the underlined portion of the passage?

Show answer & explanation

Answer: Because the cylinders have degraded over the last century, specialists now use optical scanners to play back the audio without touching the fragile wax.

Answer

Because the cylinders have degraded over the last century, specialists now use optical scanners to play back the audio without touching the fragile wax.
The correct option replaces the dangling participial modifier at the beginning of the sentence with a dependent clause ('Because the cylinders have degraded over the last century') that clearly identifies the subject performing the action. This structure connects logically to the main clause where 'specialists' act as the subject.

Step-by-Step Solution

1
Identify the dangling modifier in the original sentence.
The phrase 'Having degraded over the last century' is positioned at the start of the sentence, which means it grammatically modifies the subject of the main clause, 'specialists'. This is illogical because the specialists have not degraded; the wax cylinders have.
To ensure clarity and grammatical correctness, an introductory modifying phrase must clearly and logically describe the subject that immediately follows it.
2
Evaluate the options to find one that resolves the dangling modifier.
Changing the introductory phrase into a dependent clause with its own clear subject ('the cylinders') solves the dangling modifier issue.
By explicitly naming 'the cylinders' as the subject of the degradation, the sentence becomes logical and grammatical.
3
Check the remaining options for secondary grammatical errors.
The option that splits the dependent clause with a period creates a sentence fragment. The option using 'the degradation of the cylinders have occurred' has a subject-verb agreement error between the singular subject 'degradation' and the plural verb 'have'. Only the correct option resolves the modifier issue without introducing any new errors.
The correct answer must be free of all grammatical errors, not just the modifier error.

Key Concept

Modifier Placement
Question 17Question →

The passage below describes a famous historical site. The second sentence of the passage has been split into four segments.

'Overlooking the Urubamba River Valley, the ruins of a fifteenth-century Inca citadel continue to fascinate historians. [Segment 1] [Segment 2] [Segment 3] [Segment 4]'

Arrange the four segments below in the correct order to form a grammatically correct second sentence that avoids misplaced or dangling modifiers.

Drag items to arrange them in the correct order

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Answer

The correct sequence of segments to form a grammatically correct sentence is: 'the ancient city of Machu Picchu', followed by 'which is located in the Andes mountains', followed by 'attracts thousands of tourists', and ending with 'who hope to see the sunrise over the ruins'.
The correct order constructs the sentence: 'The ancient city of Machu Picchu, which is located in the Andes mountains, attracts thousands of tourists who hope to see the sunrise over the ruins.' This placement keeps the non-restrictive relative clause next to 'the ancient city of Machu Picchu' and the restrictive relative clause next to 'tourists', ensuring proper modifier alignment and subject-verb agreement throughout the sentence.

Step-by-Step Solution

1
Identify the main subject of the sentence.
'the ancient city of Machu Picchu' is identified as the subject because it is the only noun phrase that can logically start the sentence and serve as the subject for the main verb.
Establishing the main subject provides the grammatical foundation for the rest of the sentence.
2
Determine the placement of the relative clause starting with 'which'.
'which is located in the Andes mountains' must be placed immediately after 'the ancient city of Machu Picchu'.
To avoid a misplaced modifier, the relative clause must be adjacent to the noun it modifies. Placing it elsewhere creates a subject-verb agreement error with the singular verb 'is' and makes the meaning illogical.
3
Locate the main verb phrase.
'attracts thousands of tourists' follows the modified subject.
The main verb must follow the complete subject noun phrase to complete the independent clause.
4
Place the final relative clause modifying the object.
'who hope to see the sunrise over the ruins' must follow 'tourists'.
The relative pronoun 'who' refers to people ('tourists') and must be placed immediately after its antecedent to prevent ambiguity or misplacement.

Key Concept

Modifier Placement
Question 18Question →

Read the following passage:

Marine archaeologists recently explored the ruins of a seventeenth-century merchant ship off the Greek coast. Undisturbed on the seafloor for centuries, the divers mapped the wreckage carefully. They hoped to uncover clues about ancient Mediterranean trade routes.

Which of the following options represents the most grammatically correct revision of the underlined portion?

Show answer & explanation

Answer: Undisturbed on the seafloor for centuries, the wreckage was mapped carefully by the divers

Answer

The correct answer is the option that places the wreckage immediately after the introductory phrase while maintaining grammatical correctness and avoiding subject-verb agreement issues.
The correct option resolves the dangling modifier by placing the wreckage directly after the introductory descriptive phrase. This establishes a logical relationship between the modifier and its subject, and the rest of the sentence is grammatically correct.

Step-by-Step Solution

1
Identify the introductory modifying phrase and determine its logical subject.
The phrase is 'Undisturbed on the seafloor for centuries,' and it must describe the wreckage, not the divers.
This determines which noun must immediately follow the comma to avoid a dangling modifier.
2
Evaluate the options to see which noun follows the comma and eliminate options that keep the dangling modifier.
The original phrasing is eliminated because it places 'the divers' next to the modifier. The options placing 'the wreckage' after the modifier are retained.
This ensures the modifier is not dangling.
3
Analyze the remaining choices for grammatical errors like comma splices or subject-verb agreement.
The option turning the phrase into a separate clause is eliminated due to a comma splice. The option with the plural verb is eliminated because the singular subject 'wreckage' requires the singular verb 'was mapped' rather than 'were mapped.'
This leaves the only grammatically correct and logically structured option.

Key Concept

Introductory modifiers must be placed immediately adjacent to the noun they logically describe to avoid a dangling modifier.
Question 19Question →

Bioluminescent fungi grow on decaying wood in damp forests, emitting a soft green glow that attracts nocturnal insects. Found primarily in tropical climates, mycologists have identified over one hundred species of these glowing mushrooms. The light is produced by a chemical reaction involving a compound called luciferin.

Which of the following is the most grammatically correct and effective version of the underlined portion?

Show answer & explanation

Answer: Mycologists have identified over one hundred species of these glowing mushrooms, which are found primarily in tropical climates.

Answer

The correct answer is the option that places the modifying clause directly after the mushrooms: 'Mycologists have identified over one hundred species of these glowing mushrooms, which are found primarily in tropical climates.'
The correct choice resolves the dangling modifier by restructuring the sentence so that 'which are found primarily in tropical climates' clearly and logically modifies 'mushrooms' instead of 'mycologists'.

Step-by-Step Solution

1
Analyze the underlined sentence to identify modifier issues.
The introductory participial phrase 'Found primarily in tropical climates' is followed immediately by the subject 'mycologists', creating an illogical modifier relationship.
Introductory modifiers must describe the subject that immediately follows the comma.
2
Evaluate the choices to find a version that resolves the modifier issue without introducing new errors.
Moving the modifier into a relative clause ('which are found...') directly following 'glowing mushrooms' clarifies that the mushrooms, not the mycologists, are in tropical climates.
Placing modifiers directly adjacent to the noun they modify ensures logical clarity.
3
Eliminate choices with secondary grammatical errors.
The option containing a comma splice and the option containing a subject-verb agreement error are eliminated.
Standardized tests require choices to be free of all grammatical errors.

Key Concept

Modifier Placement
Question 20Question →

The following sentence segments, when combined, should form a single, grammatically correct sentence. Arrange the segments in the correct order to construct a sentence that contains no misplaced or dangling modifiers.

Drag items to arrange them in the correct order

Show answer & explanation

Answer

The correct order of the sentence segments is: 'Dressed in a sleek tuxedo, the master of ceremonies warmly greeted the patrons who were entering the theater.'
The correct order places the introductory participial phrase 'Dressed in a sleek tuxedo,' directly before the noun it modifies, 'the master of ceremonies.' It then follows with the main verb phrase 'warmly greeted the patrons' and concludes with the relative clause 'who were entering the theater,' which correctly modifies 'the patrons.' This arrangement ensures that all modifiers are adjacent to their targets and the sentence structure is clear and grammatical.

Step-by-Step Solution

1
Identify the introductory modifier.
The phrase 'Dressed in a sleek tuxedo,' is identified as an introductory participial phrase.
Participial phrases at the beginning of a sentence must immediately precede the noun they modify to avoid a dangling modifier.
2
Determine the subject of the modifier.
The noun phrase 'the master of ceremonies' is the logical subject who is dressed in the tuxedo.
Placing this noun phrase directly after the introductory phrase ensures the modifier is placed correctly.
3
Connect the verb and object to complete the main clause.
The verb phrase 'warmly greeted the patrons' follows the subject.
This establishes the core action of the sentence in a natural subject-verb-object order.
4
Place the relative clause next to its antecedent.
The relative clause 'who were entering the theater.' modifies 'the patrons'.
Placing this clause immediately after 'the patrons' prevents it from mismodifying other nouns like the master of ceremonies or the tuxedo.

Key Concept

Modifiers must be placed as close as possible to the words they are intended to modify to ensure clarity and grammatical correctness.
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Modifier Placement Practice Questions — ACT | Examkin