Examkin

Sentence Structure and Formation

444 questions

All types444Multiple choice368Ordering15Fill in the blank61
Question 81Question →

Because early wax cylinders are extremely fragile, playing them with a traditional stylus can permanently destroy the sound grooves. Instead, modern archivists use non-contact optical scanning to retrieve the audio; because this method preserves the recordings without physical contact.

Which choice most effectively and grammatically completes the underlined portion of the sentence?

Show answer & explanation

Answer: Instead, modern archivists use non-contact optical scanning to retrieve the audio, since this method

Answer

Instead, modern archivists use non-contact optical scanning to retrieve the audio, since this method
The correct option correctly uses the subordinating conjunction 'since' to introduce a dependent clause that provides the reason for the main action. The comma correctly separates the main clause from the dependent clause, maintaining proper grammatical flow and sentence structure.

Step-by-Step Solution

1
Analyze the grammatical structure and relationship between the clauses in the sentence.
The sentence contains two main ideas: archivists use optical scanning (an independent clause) and this method preserves the recordings (a reason or explanation that should be subordinate).
Understanding clause hierarchy helps identify whether coordination or subordination is required.
2
Evaluate the punctuation and conjunctions connecting the clauses in the options.
The option containing 'since this method' properly connects the independent clause with a subordinate clause explaining why scanning is used, avoiding run-ons, comma splices, or fragments.
A subordinating conjunction like 'since' or 'because' is required to make the second clause dependent, and it must be correctly linked to the main clause without isolating it as a fragment.

Key Concept

Subordination and Coordination
Question 82Question →

Many astronomers study distant stars using ground-based telescopes, others prefer space-based observatories because Earth's atmosphere does not blur the images.

Which choice best coordinates the two clauses in the underlined portion of the sentence?

Show answer & explanation

Answer: but others prefer

Answer

The correct answer is 'but others prefer', which properly uses a comma followed by a coordinating conjunction to link two independent clauses.
The correct option correctly resolves the comma splice by adding the coordinating conjunction 'but' after the comma. This grammatically connects the two independent clauses while expressing a logical contrast between astronomers using ground-based telescopes and those using space-based observatories.

Step-by-Step Solution

1
Identify the structure of the clauses surrounding the underlined portion.
The sentence consists of two independent clauses: 'Many astronomers study distant stars using ground-based telescopes' and 'others prefer space-based observatories...'
Determining whether the clauses are independent or dependent guides the correct choice of conjunction and punctuation.
2
Evaluate the original sentence (NO CHANGE) for grammatical correctness.
The original sentence joins two independent clauses with only a comma, resulting in a comma splice.
To correct a comma splice, we must add a coordinating conjunction, use a semicolon, or split them into two sentences.
3
Select the option that correctly coordinates the two independent clauses.
Adding the coordinating conjunction 'but' after the comma creates a grammatically correct compound sentence.
This establishes a clear, contrastive logical relationship between the two independent clauses.

Key Concept

Subordination and Coordination
Estimated Time:45s
Question 83Question →

The standard theory suggests that the architectural ruins of Göbekli Tepe were constructed by hunter-gatherers who had not yet settled into agricultural communities. A recent analysis of plant remains, however, which challenges this timeline by suggesting that early cultivation may have occurred parallel to the site's construction.

Which of the following choices is the best revision of the underlined portion?

Show answer & explanation

Answer: A recent analysis of plant remains, however, challenges this timeline, suggesting that early cultivation may have occurred parallel to the site's construction.

Answer

The choice that provides the main verb 'challenges' and uses the participle 'suggesting' to modify the independent clause.
The correct choice removes the relative pronoun 'which', allowing 'challenges' to serve as the main finite verb for the subject 'A recent analysis'. It then correctly uses a comma followed by the present participle 'suggesting' to introduce a modifying participial phrase, resulting in a grammatically complete and clear sentence.

Step-by-Step Solution

1
Identify the grammatical issue in the underlined portion.
The subject 'A recent analysis' is followed by a relative clause starting with 'which', leaving the main subject without a predicate verb and creating a sentence fragment.
Every complete sentence must contain at least one independent clause with a subject and a corresponding finite verb.
2
Evaluate choices to ensure a main finite verb is provided.
Removing the relative pronoun 'which' allows 'challenges' to function as the main verb, resolving the fragment.
Providing a main verb connects the subject to a complete action.
3
Check the punctuation and structure of the remaining clauses.
A comma followed by the present participle 'suggesting' correctly introduces a modifying participial phrase, avoiding comma splices and semicolon fragments.
Connecting clauses properly ensures the sentence does not violate punctuation rules like those governing independent and dependent clauses.

Key Concept

Recognizing and correcting sentence fragments caused by relative clauses that leave a main subject without a finite verb.
Estimated Time:1m 0s
Question 84Question →

Arrange the following sentence fragments in the correct order to construct a grammatically correct sentence that maintains a parallel structure.

Drag items to arrange them in the correct order

Show answer & explanation

Answer

To launch the new software application, the development team must first write the core source code, then test the system for critical bugs, and finally deploy the release version to the servers.
The correct order constructs a coherent sentence where the modal verb 'must' is followed by a parallel series of base-form verbs: 'write', 'test', and 'deploy'. The transition words 'first', 'then', and 'finally' establish a clear chronological order that locks the sequence of these parallel elements.

Step-by-Step Solution

1
Identify the main clause and the governing verb.
The main clause is 'To launch the new software application, the development team must', which ends with the modal verb 'must'. This modal verb requires a base-form verb (bare infinitive) to follow it.
Establishing the main clause is necessary to determine the grammatical constraints for the rest of the sentence.
2
Identify the parallel elements and their grammatical form.
The other fragments contain actions: 'first write the core source code' (verb: 'write'), 'then test the system for critical bugs' (verb: 'test'), and 'and finally deploy the release version to the servers' (verb: 'deploy'). All three verbs are in the base form, which satisfies the parallel structure required after the modal verb 'must'.
Ensuring all items in the series share the same grammatical form (base verbs) is the core rule of parallel structure.
3
Use chronological and transitional markers to determine the correct order.
The adverbs 'first', 'then', and 'finally' indicate a chronological sequence. Therefore, 'first write...' must precede 'then test...', which must precede 'and finally deploy...'.
Transition words and logical sequencing determine the exact order of the parallel elements.

Key Concept

Parallel Structure in Compound Predicates
Question 85Question →

Archaeologists studying the ancient city of Caral in Peru have uncovered evidence of a highly developed civilization that thrived around 3000 BCE. Although the site lacks any trace of defensive walls or warfare-related weaponry. Instead, findings suggest a society built on trade, music, and agriculture, challenging the traditional view that early cities arose primarily out of a need for defense.

Which of the following choices is the best revision of the underlined portion?

Show answer & explanation

Answer: The site lacks any trace of defensive walls or warfare-related weaponry. Instead,

Answer

The option that replaces the underlined text with a complete sentence followed by a period and a capitalized transition word is correct because it eliminates the fragment without creating punctuation errors.
The correct option resolves the sentence fragment by converting the dependent clause into a grammatically complete, independent sentence and separating it from the subsequent independent clause with a period.

Step-by-Step Solution

1
Analyze the underlined portion and identify its grammatical role.
The clause 'Although the site lacks any trace of defensive walls or warfare-related weaponry' is a dependent clause due to the subordinating conjunction 'Although'. Leaving it punctuated as a complete sentence creates a sentence fragment.
Recognizing fragments is the first step to correcting them.
2
Evaluate the options to find a choice that provides a complete independent clause.
The option that removes the subordinating conjunction 'Although' and keeps the finite verb 'lacks' successfully forms an independent clause ('The site lacks...').
An independent clause must contain a subject and a finite verb and express a complete thought.
3
Verify punctuation to ensure no new errors are introduced.
Using a period to separate the two independent clauses avoids comma splices and semicolon errors.
Two independent clauses must be separated by appropriate punctuation, such as a period or a semicolon.

Key Concept

Sentence Fragments
Estimated Time:1m 0s
Question 86Question →

The following passage is about oceanographer Marie Tharp:

In the mid-twentieth century, geologist Marie Tharp created the first comprehensive map of the entire ocean floor. [1] Although her colleague Bruce Heezen initially dismissed her findings as 'girl talk,' but Tharp persisted in her analysis of sonar data to discover the Mid-Atlantic Ridge.

Which of the following options, if substituted for the underlined portion in sentence [1], would make the sentence grammatically correct?

Show answer & explanation

Answer: Although her colleague Bruce Heezen initially dismissed her findings as 'girl talk,' Tharp

Answer

Although her colleague Bruce Heezen initially dismissed her findings as 'girl talk,' Tharp
The option that removes the coordinating conjunction 'but' while keeping the subordinating conjunction 'Although' correctly subordinates the introductory clause and joins it to the main clause with a comma.

Step-by-Step Solution

1
Analyze the original sentence structure to identify the relationship between the clauses.
The sentence consists of two clauses: 'Although her colleague Bruce Heezen initially dismissed her findings as girl talk' (dependent clause) and 'Tharp persisted in her analysis of sonar data to discover the Mid-Atlantic Ridge' (independent clause).
Understanding the dependency of the clauses helps determine the correct conjunctions and punctuation needed to join them.
2
Identify the grammatical error in the original sentence.
The original sentence uses both 'Although' (a subordinating conjunction) and 'but' (a coordinating conjunction) to link the clauses. This is redundant because only one conjunction is needed to establish the relationship.
Double conjunctions violate standard rules of subordination and coordination.
3
Evaluate the answer choices to find the one that establishes a correct relationship without introducing new errors.
The option that retains 'Although' and removes 'but' correctly subordinates the first clause and allows the comma to join it to the main clause. The option without 'Although' and with just a comma creates a comma splice. The option with a semicolon creates a sentence fragment because the first clause is dependent.
A dependent clause followed by an independent clause must be joined by a comma, not a semicolon, and cannot have both subordinating and coordinating conjunctions.

Key Concept

Subordination and Coordination
Question 87Question →

The administrative structures of medieval merchant guilds, which regulated local trade and protected artisans' interests, were far more decentralized than modern labor unions, which typically operate under a highly centralized leadership.

Which choice completes the sentence with a logical and grammatically correct comparison?

Show answer & explanation

Answer: those of modern labor unions, which

Answer

The correct option is the phrase that includes the pronoun 'those of' followed by a comma and the relative pronoun 'which' to logically compare structures to structures while maintaining grammatical agreement.
The correct answer resolves the illogical comparison by introducing the plural pronoun 'those' (representing 'structures'), thereby comparing the administrative structures of medieval merchant guilds to the administrative structures of modern labor unions. It also uses a comma to correctly introduce the nonrestrictive relative clause.

Step-by-Step Solution

1
Identify the elements being compared in the sentence.
The sentence attempts to compare the 'administrative structures of medieval merchant guilds' to 'modern labor unions.'
To ensure logical comparison, plural structures must be compared to plural structures, not to entire organizations.
2
Select the correct pronoun to represent the plural noun 'structures'.
The plural pronoun 'those' is required to refer back to 'structures'. Using 'that' would create a singular-plural mismatch.
Using 'those of' translates to 'the structures of,' making the noun-to-noun comparison logical and parallel.
3
Verify punctuation and grammatical integration.
The relative clause beginning with 'which' is nonrestrictive and must be set off with a comma, not a semicolon, to avoid a fragment.
This confirms that the option containing 'those of' and a comma is both logically and structurally correct.

Key Concept

Illogical and Incomplete Comparisons
Estimated Time:1m 0s
Question 88Question →

The literary critic argued that the author's late novels succeed not because they present realistic depictions of historical events, but because they explore the psychological fragmentation of their characters, and by challenging the conventional narrative structures of the era.

Which of the following choices best maintains a parallel grammatical structure in the sentence?

Show answer & explanation

Answer: but because they explore the psychological fragmentation of their characters and challenge

Answer

The correct choice is the one that uses present-tense parallel verbs ('explore' and 'challenge') within the subordinate clause starting with 'but because'.
The correct choice maintains parallel structure by using the subordinating conjunction 'because' to mirror the initial clause ('not because they present...') and by coordinating two present-tense verbs ('explore' and 'challenge') that share the subject 'they'. This keeps the sentence grammatically balanced and clear.

Step-by-Step Solution

1
Identify the parallel elements in the sentence, starting with the correlative construction 'not because... but because...'.
The first element of the comparison is 'not because they present...', which establishes that the parallel elements must be clauses introduced by the subordinating conjunction 'because' followed by present-tense verbs.
To maintain parallel structure, the parts of the sentence expressing comparable ideas must share the same grammatical form.
2
Analyze the second element (the underlined part) to ensure it mirrors the first element.
The second element must begin with 'but because they...' and contain present-tense verbs to match the structure of 'not because they present...'.
Symmetry between the two clauses of a correlative conjunction is required for grammatical correctness.
3
Ensure any compound verbs within the second element are also parallel.
The verbs 'explore' and 'challenge' are both present-tense verbs that share the subject 'they'.
Coordinated actions performed by the same subject within a clause must share the same verb tense and form.

Key Concept

Parallel Structure
Question 89Question →

Cognitive linguists studying bilingualism have observed that children raised in multilingual households often develop cognitive flexibility at an early age. Because they must constantly negotiate between two distinct grammatical systems. This forces their brains to select the appropriate vocabulary while inhibiting the other language.

Which of the following choices is the best revision of the underlined portion?

Show answer & explanation

Answer: They must constantly negotiate between two distinct grammatical systems; this

Answer

The option that changes the underlined portion to an independent clause and uses a semicolon to connect it to the next independent clause is the correct choice.
The correct option replaces the dependent clause fragment with a complete independent clause and uses a semicolon to connect it to the following independent clause. Since both clauses can stand on their own as complete sentences, the semicolon is the grammatically correct punctuation to join them.

Step-by-Step Solution

1
Analyze the underlined portion and the surrounding context to identify grammatical errors.
The clause starting with 'Because' is a dependent clause that ends with a period, creating a sentence fragment.
A dependent clause cannot stand alone as a complete sentence.
2
Evaluate the options to find a choice that eliminates the sentence fragment while maintaining correct punctuation.
The option using a semicolon correctly connects two related independent clauses ('They must...' and 'this forces...').
A semicolon is the appropriate punctuation to link two independent clauses without a coordinating conjunction.
3
Verify that other options do not introduce new grammatical errors such as comma splices or other fragments.
The comma-separated option creates a comma splice, and the option with 'Constant negotiation' before the semicolon creates a fragment.
Ensuring no new errors are introduced confirms the single correct option.

Key Concept

Identifying and correcting sentence fragments by ensuring all clauses standing as sentences have both a subject and a verb and are not subordinate, or are properly linked to other clauses using appropriate punctuation like semicolons.
Estimated Time:1m 0s
Question 90Question →

To attract songbirds to your backyard, you should hang a bird feeder, keep a fresh water source, and cleaning the nesting boxes regularly.

Which choice best completes the sentence to maintain parallel structure?

Show answer & explanation

Answer: clean the nesting boxes regularly

Answer

clean the nesting boxes regularly
The correct choice is the option that reads 'clean the nesting boxes regularly.' The sentence contains a list of three actions that follow the helping verb 'should': 'hang a bird feeder,' 'keep a fresh water source,' and the underlined portion. Because 'hang' and 'keep' are base verbs, the final action in the list must also start with a base verb to maintain parallel structure.

Step-by-Step Solution

1
Identify the items in the list.
The sentence lists three actions to attract songbirds: 'hang a bird feeder,' 'keep a fresh water source,' and 'cleaning the nesting boxes regularly.'
Recognizing the elements of a series is necessary to analyze their parallel structure.
2
Determine the grammatical form of the correct items in the list.
The first two items in the list, 'hang' and 'keep,' are base verbs following the modal helper verb 'should.'
Identifying the established pattern shows what grammatical form the final item must match.
3
Select the option that matches the established grammatical form.
The option containing the base verb 'clean' maintains the parallel structure.
Parallel structure requires all items in a list to share the same grammatical form.

Key Concept

Parallel structure requires that items in a list or series follow the same grammatical form.
Question 91Question →

The soaring vaults and pointed arches of Gothic cathedrals are much more structurally efficient than Romanesque churches, which relied on heavy, thick walls to support their massive weight.

Which choice best corrects the underlined portion to make the comparison logical and grammatically correct?

Show answer & explanation

Answer: those of Romanesque churches, which relied

Answer

The option containing 'those of Romanesque churches, which relied' corrects the illogical comparison and uses proper punctuation.
The correct option replaces the illogical comparison by introducing the plural demonstrative pronoun 'those of,' which logically refers back to the plural subject 'soaring vaults and pointed arches.' Additionally, it correctly sets off the nonessential relative clause with a comma.

Step-by-Step Solution

1
Identify the elements being compared in the sentence.
The sentence attempts to compare 'The soaring vaults and pointed arches of Gothic cathedrals' (plural structural features) to 'Romanesque churches' (entire buildings).
To form a logical comparison, the sentence must compare structural features to other structural features, not to entire buildings.
2
Select the correct plural pronoun to replace the illogical comparison.
The plural pronoun 'those' must be used to refer back to the plural noun phrase 'soaring vaults and pointed arches.' This changes the comparison to 'those of Romanesque churches.'
Using 'those of' ensures that vaults and arches are being compared to the vaults and arches of Romanesque churches.
3
Evaluate the punctuation and grammatical structure of the remaining clauses.
The phrase 'which relied' is a dependent clause that modifies 'Romanesque churches' and must be separated from the main clause by a comma, not a semicolon or by initiating a comma splice.
A semicolon cannot separate a dependent clause from an independent clause, and replacing 'which' with 'they' creates an ungrammatical comma splice.

Key Concept

Illogical and Incomplete Comparisons
Question 92Question →

Monarch butterflies are famous for their long-distance migration. With individual butterflies completing only a single leg of the multi-generational journey.

Which of the following is the best revision of the underlined portion?

Show answer & explanation

Answer: ; individual butterflies complete only a single leg of the multi-generational journey.

Answer

; individual butterflies complete only a single leg of the multi-generational journey.
The correct option successfully resolves the sentence fragment by establishing a main verb ('complete') and correctly joining the two independent clauses with a semicolon.

Step-by-Step Solution

1
Analyze the underlined portion to identify if it is a fragment.
The phrase starting with 'With' and containing the participle 'completing' does not have a main conjugated verb, meaning it is a sentence fragment.
Every sentence must have at least one independent clause containing a subject and a verb.
2
Evaluate the relationship between the two clauses.
Both 'Monarch butterflies are famous for their long-distance migration' and 'individual butterflies complete only a single leg of the multi-generational journey' are independent clauses.
Since both clauses can stand alone, they must be separated by a semicolon, a period, or a comma combined with a coordinating conjunction.
3
Select the option that correctly joins the two independent clauses without creating a fragment or a comma splice.
Using a semicolon is the correct grammatical way to connect these two independent clauses.
The correct option provides a semicolon and removes the fragment-causing words, creating two complete, connected thoughts.

Key Concept

Identifying and correcting sentence fragments by ensuring every sentence contains an independent clause, and properly joining independent clauses.
Question 93Question →

In the 1950s, geologist Marie Tharp painstakingly plotted sonar data to map the ocean floor; her maps eventually revealed the massive Mid-Atlantic Ridge. Although her colleague Bruce Heezen initially dismissed her discovery as 'girl talk,' he later admitted she was correct, and the scientific community was forced to accept the reality of continental drift.

Which of the following choices best maintains the grammatical correctness of the underlined portion of the sentence?

Show answer & explanation

Answer: NO CHANGE

Answer

The option that retains the original sentence structure (NO CHANGE)
The correct answer properly subordinates the introductory concessive clause using the subordinating conjunction 'Although' and coordinates the subsequent independent clause using a comma followed by the coordinating conjunction 'and'. This creates a grammatically correct complex-compound sentence.

Step-by-Step Solution

1
Analyze the structure of the underlined portion and the surrounding sentence to identify the clauses.
The sentence contains three clauses: an introductory concessive clause ('Although... dismissed...'), a main independent clause ('he later admitted...'), and a coordinated independent clause ('the scientific community was forced...').
Understanding clause boundaries is essential for evaluating coordination and subordination rules.
2
Evaluate the punctuation and conjunctions connecting these clauses in the original sentence.
The dependent clause starting with 'Although' is separated from the main clause by a comma. The two independent clauses are connected by a comma and the coordinating conjunction 'and'. This structure is grammatically correct.
This establishes the baseline correctness of the original construction.
3
Evaluate the distractors for grammatical errors such as run-ons, comma splices, or fragments.
The option using a semicolon creates a fragment by separating a dependent clause from an independent clause. The option without 'Although' creates a comma splice. The option with 'Although' and 'but' creates a double-conjunction fragment.
This confirms that the other options introduce grammatical errors.

Key Concept

Subordination and Coordination
Estimated Time:1m 0s
Question 94Question →

Beneath the forest floor, vast mycorrhizal networks connect individual trees, allowing them to share carbon and warning signals. Although many ecologists originally questioned whether these underground pathways were active channels of mutual aid, but recent experiments have demonstrated that trees actively regulate resource sharing to support weaker neighbors.

Which choice most effectively coordinates and subordinates the clauses in the underlined portion to maintain grammatical correctness?

Show answer & explanation

Answer: Although many ecologists originally questioned whether these underground pathways were active channels of mutual aid, recent

Answer

The correct option is the one that retains the subordinating conjunction 'Although' at the beginning of the clause and joins it to the main clause with a comma, removing the redundant coordinating conjunction 'but'.
The correct choice keeps the subordinating conjunction 'Although' to establish a relationship of contrast between the two clauses, and uses a comma to link the dependent clause to the subsequent independent clause. This avoids redundant conjunctions and punctuation errors.

Step-by-Step Solution

1
Analyze the logical relationship between the first clause and the second clause.
The first clause ('Although many ecologists originally questioned...') sets up a contrast with the second clause ('recent experiments have demonstrated...').
Identifying the logical relationship helps determine the correct conjunctions to use.
2
Examine the grammatical structure of the sentence.
The first clause is dependent because of the subordinating conjunction 'Although'. The second clause starting with 'recent experiments' is independent.
Determining clause types is necessary to apply correct punctuation and conjunction rules.
3
Evaluate the grammar of joining a dependent clause to an independent clause.
A dependent clause starting with a subordinating conjunction should be joined to an independent clause by a comma. Adding 'but' is redundant, and using a semicolon creates a fragment.
This step eliminates grammatically incorrect structures (double conjunctions and semicolon fragments).
4
Evaluate the option that removes the subordinating conjunction.
Without 'Although', the first clause becomes independent, and separating it from the second independent clause with only a comma creates a comma splice.
This step ensures that the transition between clauses is properly coordinated without causing a comma splice.

Key Concept

Subordination and Coordination
Question 95Question →

The wingspan of the bald eagle is much wider than a red-tailed hawk, which allows the eagle to soar for hours.

Which choice best corrects the underlined portion of the sentence?

Show answer & explanation

Answer: that of a red-tailed hawk, which

Answer

The correct option is 'that of a red-tailed hawk, which' because it logically compares the wingspan of one bird to the wingspan of another using the pronoun 'that', while maintaining correct punctuation with a relative clause.
The correct option logically compares the 'wingspan' of a bald eagle to 'that' (the wingspan) of a red-tailed hawk. Using 'that of' sets up a clear, parallel, and logical noun-to-noun comparison. Furthermore, the relative clause beginning with 'which' is correctly set off by a comma to add non-essential information.

Step-by-Step Solution

1
Identify the two elements being compared in the sentence.
The sentence attempts to compare the 'wingspan of the bald eagle' to 'a red-tailed hawk'.
To be logical, a comparison must compare like things (noun-to-noun comparison of similar attributes).
2
Evaluate the options for logical comparison and correct punctuation.
Using 'that of' refers back to 'the wingspan', making the comparison logical. The relative pronoun 'which' correctly starts the dependent clause after the comma.
This maintains both logical structure and proper sentence boundaries.

Key Concept

Illogical comparisons occur when a sentence compares two things that cannot be logically compared. To correct this, use possessive nouns (e.g., 'a hawk's') or pronouns like 'that of' (singular) or 'those of' (plural) to ensure like things are compared.
Question 96Question →

Maria wanted to bake a chocolate cake for her brother's birthday. Since she did not have any sugar in her pantry, she had to walk to the local grocery store before she could start baking.

Which choice is the most grammatically correct replacement for the underlined portion of the sentence?

Show answer & explanation

Answer: NO CHANGE

Answer

NO CHANGE
The original phrasing is correct because the subordinating conjunction 'since' properly introduces the cause ('not having sugar') for the effect described in the main clause ('having to walk to the store'). The dependent clause is correctly joined to the independent clause with a comma.

Step-by-Step Solution

1
Analyze the relationship between the clauses: 'she did not have any sugar in her pantry' (the cause) and 'she had to walk to the local grocery store' (the effect).
The relationship is cause-and-effect, requiring a subordinating conjunction like 'since' or 'because' to introduce the cause.
Choosing the correct conjunction ensures logical coherence.
2
Check the punctuation and structure of the sentence.
The dependent clause 'Since she did not have any sugar in her pantry' is correctly set off by a comma from the main independent clause.
This avoids creating run-ons, comma splices, or fragment errors.

Key Concept

Subordination and Coordination
Question 97Question →

Giant kelp forests, which grow along the rocky coastlines of the Pacific Ocean, represent one of the most productive ecosystems on Earth. Because these massive algae can grow up to two feet per day under ideal conditions.

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

Show answer & explanation

Answer: Earth because these massive algae can grow

Answer

The correct option is the one that removes the punctuation between the main clause and the dependent clause, reading 'Earth because these massive algae can grow'.
The correct answer correctly joins the dependent clause starting with 'because' to the main independent clause without any intervening punctuation, eliminating the sentence fragment.

Step-by-Step Solution

1
Analyze the underlined portion and the surrounding text to determine clause types.
The clause describing giant kelp forests as productive ecosystems is independent, while the clause starting with the subordinating conjunction 'Because' is dependent.
Identifying clause types is necessary to determine proper punctuation and sentence structure.
2
Evaluate the grammar of the original sentence.
The original text separates the dependent clause from the independent clause with a period, creating a sentence fragment.
A dependent clause cannot stand alone as a complete sentence.
3
Test the remaining choices to find the grammatically correct link.
Using a semicolon is incorrect because semicolons must connect two independent clauses. Removing the subordinating conjunction and using a comma creates a comma splice. Removing the punctuation entirely correctly joins the dependent clause to the preceding independent clause.
Finding the correct transition avoids both fragments and run-on sentences.

Key Concept

Identifying and correcting sentence fragments by properly connecting dependent clauses to independent clauses.
Estimated Time:1m 0s
Question 98Question →

Julia Morgan was a pioneering American architect who designed more than 700 buildings during her career, including the famous Hearst Castle. Although she was the first woman admitted to the architecture program at the École des Beaux-Arts in Paris; she faced constant discrimination in the male-dominated field.

Which choice represents the most grammatically correct way to write the underlined portion of the sentence?

Show answer & explanation

Answer: Although she was the first woman admitted to the architecture program at the École des Beaux-Arts in Paris,

Answer

The choice that uses a comma after 'Paris' without removing the subordinating conjunction 'Although' is correct.
The correct choice properly subordinates the introductory clause to the main clause. The subordinating conjunction 'Although' creates a dependent clause, which must be followed by a comma when it precedes the independent clause. Using a comma after 'Paris' establishes a grammatically correct sentence structure.

Step-by-Step Solution

1
Identify the structure of the clause starting with the underlined portion.
The clause begins with the subordinating conjunction 'Although', making it a dependent clause.
Determining whether the clause is dependent or independent is necessary to apply correct punctuation and coordination rules.
2
Evaluate how the dependent clause is joined to the main independent clause ('she faced constant discrimination...').
A dependent clause preceding an independent clause must be separated by a comma, not a semicolon or a period.
Separating a dependent clause from an independent clause with a semicolon or period results in a punctuation error or a sentence fragment.
3
Check the remaining options for other grammatical errors, such as comma splices.
Removing the subordinating conjunction and joining the resulting independent clauses with a comma creates a comma splice.
To ensure the final choice is grammatically sound, alternative options must be ruled out.

Key Concept

Punctuation of dependent and independent clauses using subordination
Question 99Question →

The amino acid profiles of quinoa, an ancient pseudocereal cultivated in the Andes for thousands of years, are significantly more balanced than wheat, which has a lower concentration of the essential amino acid lysine.

Which choice best maintains a logical and grammatically correct comparison in the sentence?

Show answer & explanation

Answer: those of wheat, which has

Answer

those of wheat, which has
The correct answer uses the plural pronoun 'those' to refer back to 'profiles'. This makes the comparison logical and parallel, comparing the amino acid profiles of quinoa to those (the profiles) of wheat. The relative pronoun 'which' correctly initiates a dependent clause modifying 'wheat', with the singular verb 'has' agreeing with 'wheat'.

Step-by-Step Solution

1
Identify the comparison being made in the sentence.
The sentence compares the 'amino acid profiles' of quinoa to 'wheat'.
Comparing a plural attribute ('profiles') to a singular object ('wheat') is illogical; we must compare profiles to profiles.
2
Use a pronoun to represent the compared element in a parallel structure.
Since 'profiles' is plural, the plural pronoun 'those' must be used ('those of wheat').
This ensures grammatical parallelism and logical comparison.
3
Check punctuation and clause connection.
The relative clause 'which has...' must be connected to the main clause with a comma, not a semicolon or by initiating a new independent clause without proper conjunctions.
A semicolon before 'which' creates a fragment, and omitting 'which' to write 'it has' creates a comma splice.

Key Concept

Illogical and Incomplete Comparisons
Question 100Question →

The following passage is an excerpt from an art history essay about archaeological discoveries in Italy.

Although the ancient Roman city of Pompeii has been excavated for centuries, a newly uncovered villa contains frescoes that challenge previous assumptions about Roman interior design. While the pigments of the frescoes remained preserved under layers of volcanic ash; depicting mythological scenes that scholars once believed were only popular in the later empire.

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

Show answer & explanation

Answer: The pigments of the frescoes remained preserved under layers of volcanic ash, depicting mythological scenes that

Answer

The pigments of the frescoes remained preserved under layers of volcanic ash, depicting mythological scenes that
The correct revision removes the subordinating conjunction and the misplaced semicolon. This leaves 'The pigments of the frescoes remained preserved under layers of volcanic ash' as a complete independent clause. The following participial phrase beginning with 'depicting' correctly modifies the main clause, making the entire sentence grammatically complete.

Step-by-Step Solution

1
Analyze the underlined portion in the context of the surrounding sentence to identify the clauses.
The original text features the subordinating conjunction 'While', which makes the clause dependent, followed by a semicolon and a participial modifier. This leaves the sentence without any independent clause.
Every grammatically correct sentence must contain at least one independent clause consisting of a subject and a finite verb.
2
Evaluate how to eliminate the fragment structure and correct the punctuation.
Removing the subordinating conjunction and replacing the semicolon with a comma before the participle 'depicting' creates a valid independent clause followed by an adjective modifier.
This establishes a complete sentence where 'The pigments' serves as the subject and 'remained' serves as the verb.
3
Verify that the correct revision does not introduce new errors such as comma splices or alternative fragments.
The correct revision maintains a single independent clause with proper modification, whereas other choices either leave the clause dependent or splice two independent clauses together with a comma.
Ensuring that the chosen revision resolves the fragment without introducing a comma splice or another fragment structure confirms the correct answer.

Key Concept

Sentence Fragments
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