Examkin

Sentence Structure and Formation

444 questions

All types444Multiple choice368Ordering15Fill in the blank61
Question 1Question →

In the English language, modifier placement is crucial for clarity. In the sentence below, a choice must be made between two parenthetical options to avoid a dangling modifier. Which of the two phrases ('the annual journey of these insects became clear to Dr. Patel.' or 'Dr. Patel finally understood the annual journey of these insects.') is grammatically correct and logically completes the sentence?

Fill in the blanks below

Having studied the migration patterns of monarch butterflies for over a decade,
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Answer

Dr. Patel finally understood the annual journey of these insects.
The introductory modifier 'Having studied the migration patterns...' must modify the subject of the main clause. The correct phrase ('Dr. Patel finally understood...') places the person who did the studying immediately after the comma, creating a logical and grammatically correct sentence.

Step-by-Step Solution

1
Identify the introductory modifying phrase and determine who or what is performing the action.
The introductory participial phrase is 'Having studied the migration patterns of monarch butterflies for over a decade,' which describes the act of studying.
An introductory modifier must logically describe the subject that immediately follows the comma.
2
Evaluate the subjects of the two options to find the one that logically performs the action.
In the first option, the subject is 'the annual journey.' In the second option, the subject is 'Dr. Patel.'
A journey cannot study butterfly migration, but a scientist like Dr. Patel can.
3
Select the grammatically correct option to complete the sentence.
The phrase starting with 'Dr. Patel' prevents a dangling modifier and ensures the sentence is clear and logically structured.
Placing the logical actor directly after the introductory modifier satisfies standard English grammar conventions.

Key Concept

Avoiding dangling modifiers by placing the logical subject immediately after the introductory modifying phrase.
Estimated Time:1m 0s
Question 2Question →

The sentence below describes the final steps of preparing a report. What verb form correctly completes the sentence to maintain parallel structure with the other actions in the list?

Fill in the blanks below

Before publishing the report, the editors spent hours verifying the sources, formatting the citations, and the spelling of technical terms.
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Answer

Any present participle (verb ending in -ing) that logically fits the context, such as 'checking', 'proofreading', or 'correcting'.
The correct answer must be a present participle (ending in -ing) because the previous two items in the list ('verifying' and 'formatting') are present participles. Grammatical parallelism requires all items in a coordinate list to share the same part of speech and form.

Step-by-Step Solution

1
Identify the structure of the list in the sentence.
The sentence lists three actions the editors did: 'verifying the sources', 'formatting the citations', and the action in the blank.
Grammatical items in a list must share the same form to maintain parallel structure.
2
Determine the grammatical form of the existing list items.
Both 'verifying' and 'formatting' are present participles (verbs ending in -ing).
This establishes the grammatical pattern that the final list item must follow.
3
Choose a verb that fits the context of 'the spelling of technical terms' and matches the present participle form.
Verbs like 'checking', 'proofreading', or 'correcting' fit both the grammatical pattern and the semantic context.
Using an -ing verb maintains parallelism, whereas other forms like 'checked' or 'to check' would break the pattern.

Key Concept

Parallelism in a list of actions requires all verbs to share the same grammatical form.
Question 3Question →

The sentence below contains a dangling modifier because the introductory participial phrase does not logically modify the subject of the clause that follows:

'Determining that the fossilized tracks belonged to a juvenile theropod, the footprints were carefully cast by the paleontologists in plaster.'

To correct this error, complete the sentence by typing a grammatically correct clause in the blank that begins with the subject 'the paleontologists' and includes the verb 'cast', the adverb 'carefully', and the direct object 'the footprints'.

Fill in the blanks below

Determining that the fossilized tracks belonged to a juvenile theropod, in plaster.
Show answer & explanation

Answer

The corrected sentence should read: 'Determining that the fossilized tracks belonged to a juvenile theropod, the paleontologists carefully cast the footprints in plaster.'
The correct response resolves the dangling modifier by placing the logical subject—the paleontologists—immediately after the introductory phrase. Since it was the paleontologists who determined the identity of the tracks, they must serve as the subject of the independent clause. Phrasing the clause in the active voice ('the paleontologists carefully cast the footprints') ensures grammatical alignment and clear sentence structure.

Step-by-Step Solution

1
Identify the introductory modifier and its logical subject.
The phrase 'Determining that the fossilized tracks belonged to a juvenile theropod' describes an action that requires a conscious agent capable of making a determination.
Introductory modifiers must logically describe the subject of the main clause that immediately follows.
2
Identify the grammatical error in the original sentence.
The original sentence uses 'the footprints' as the subject of the main clause, which creates a dangling modifier because footprints cannot determine their own origin.
A dangling modifier occurs when the modifier's target is either missing or incorrectly identified in the sentence.
3
Rephrase the clause in the active voice with the correct logical subject.
Change the subject of the main clause to 'the paleontologists' and express the action in the active voice: 'the paleontologists carefully cast the footprints'.
This placement aligns the introductory modifier with the correct subject, ensuring logical coherence and grammatical correctness.

Key Concept

Introductory modifiers must logically modify the subject of the main clause that follows.
Estimated Time:1m 0s
Question 4Question →

The botanist spent several months studying the rare orchid in the cloud forest. Because she wanted to document its unique pollination process.

Which of the following choices best replaces the underlined portion of the sentence?

Show answer & explanation

Answer: forest because she wanted to document

Answer

The correct choice is the option that removes the punctuation and capitalization to connect the dependent clause beginning with 'because' to the main independent clause, creating a single grammatically correct sentence.
The correct option correctly joins the dependent clause to the main independent clause without any punctuation, creating a single, grammatically complete sentence that flows naturally.

Step-by-Step Solution

1
Analyze the underlined portion to determine the relationship between the clauses.
The clause starting with 'Because' is a dependent clause that cannot stand alone as a complete sentence.
A dependent clause starting with a subordinating conjunction requires an independent clause to complete its thought.
2
Evaluate the choices to see which one correctly connects the dependent clause to the preceding independent clause.
Removing the period and capitalized 'Because' to write 'forest because she wanted to document' successfully links the two clauses.
An adverbial dependent clause that follows an independent clause generally does not require any punctuation separating them.

Key Concept

A sentence fragment occurs when a dependent clause is punctuated as a complete sentence. Connecting the dependent clause to an adjacent independent clause resolves the fragment.
Question 5Question →

To complete the architectural project on time, the team spent the weekend drafting the blueprints, revising the budget, and [they conducted site inspections].

Which choice best maintains parallel structure in the sentence?

Show answer & explanation

Answer: conducting site inspections

Answer

conducting site inspections
The correct answer utilizes a gerund phrase ('conducting site inspections') which establishes grammatical parallelism with the other items in the series ('drafting the blueprints' and 'revising the budget').

Step-by-Step Solution

1
Identify the items in the list or series within the sentence.
The series consists of three activities: 'drafting the blueprints', 'revising the budget', and '[they conducted site inspections]'.
To analyze parallel structure, we must first locate all elements in the compound construction.
2
Determine the grammatical form of the correct list items.
'drafting the blueprints' and 'revising the budget' are both gerund phrases (verb ending in -ing + noun phrase).
Parallel structure requires that all items in a list or series share the same grammatical form.
3
Evaluate the choices to find the one that matches this gerund form.
'conducting site inspections' is a gerund phrase, making it grammatically parallel to the other list items.
Selecting the gerund phrase ensures grammatical consistency and corrects the faulty parallelism.

Key Concept

Parallel structure requires that elements in a series, list, or compound construction share the same grammatical form (e.g., all gerunds, all infinitives, or all clauses).
Estimated Time:1m 0s
Question 6Question →

To prepare for the chemistry lab, students must put on their safety goggles, tie back long hair, and they should wash their hands thoroughly.

Which of the following options completes the sentence with the correct parallel structure?

Show answer & explanation

Answer: wash their hands

Answer

wash their hands
The correct option is 'wash their hands' because the list contains three actions that the students must perform. The first two actions, 'put on' and 'tie back', are expressed as base verbs. To maintain parallel structure, the third action must also be a base verb: 'wash'.

Step-by-Step Solution

1
Identify the items in the list and analyze their grammatical structure.
The first two items in the list are 'put on their safety goggles' (starting with the base verb 'put') and 'tie back long hair' (starting with the base verb 'tie').
To maintain parallel structure, the final item in the list must also start with a base verb in the same form.
2
Evaluate the choices to find the one that begins with a base verb and fits the pattern.
The option 'wash their hands' begins with the base verb 'wash', completing the pattern: 'put on...', 'tie back...', and 'wash...'.
This matches the active voice and base verb form of the other items in the list.

Key Concept

Parallel structure requires that items in a list or series maintain the same grammatical form.
Question 7Question →

The oceanographers spent several weeks tracking the migration of blue whales in the Pacific Ocean. Hoping to understand how changing water temperatures affect their travel routes.

Which of the following choices best corrects the underlined portion to ensure the sentence is grammatically complete?

Show answer & explanation

Answer: Ocean, hoping to understand

Answer

The correct choice is 'Ocean, hoping to understand' because it resolves the fragment by attaching the participial phrase to the main clause.
The correct choice is 'Ocean, hoping to understand' because it resolves the sentence fragment by attaching the participial phrase to the preceding independent clause with a comma.

Step-by-Step Solution

1
Analyze the original underlined text and determine if it forms a complete sentence.
The phrase starting with 'Hoping to understand' is a participial phrase that lacks a subject and a conjugated verb, making it a sentence fragment.
To identify sentence structure errors and choose the correct grammatical resolution.
2
Evaluate the choices to find a version that resolves the fragment without creating new punctuation or structure errors.
Using a comma to attach the participial phrase to the preceding independent clause is the grammatically correct solution.
To ensure the sentence contains both a subject and a verb and flows logically without punctuation errors.

Key Concept

Sentence Fragments
Question 8Question →

Deep within a mountain on the remote island of Spitsbergen, the Svalbard Global Seed Vault protects millions of crop seeds. The vault is built deep inside a sandstone mountain, where the surrounding permafrost maintains a natural freezing temperature even if the cooling system fails.

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

Show answer & explanation

Answer: NO CHANGE

Answer

NO CHANGE
The original phrasing 'NO CHANGE' is correct because it uses the relative adverb 'where' to connect a subordinate clause to the main clause. This subordinate clause is grammatically complete, contains a subject and a conjugated verb, and correctly modifies the preceding noun 'mountain'.

Step-by-Step Solution

1
Analyze the underlined portion to determine if the clause connection is grammatically correct and logical.
The original text uses the relative adverb 'where' to initiate a subordinate clause modifying the noun 'mountain'. This clause contains a subject ('permafrost') and a finite verb ('maintains'), making it grammatically complete as a subordinate clause.
Correct subordination allows the sentence to flow logically without creating run-ons or fragments.
2
Evaluate the other choices to identify punctuation and clause structure errors.
Removing 'where' and using a comma creates a comma splice between two independent clauses. Using a semicolon with 'because' creates a fragment since semicolons must separate two independent clauses. Using 'while' with the participle 'maintaining' fails to provide a finite verb, creating a fragment.
Standard English grammar rules prohibit joining independent clauses with only a comma, and dependent clauses cannot follow a semicolon or lack a finite verb.

Key Concept

Subordination and Coordination
Question 9Question →

Refer to the underlined portion marked [1] in the passage below:

Many species of mushrooms glow in the [1] dark, and this light attracts insects that help disperse their spores.

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

Show answer & explanation

Answer: NO CHANGE

Answer

The option containing 'NO CHANGE', which properly coordinates the two clauses using a comma and the coordinating conjunction 'and'.
The original text correctly uses a comma followed by the coordinating conjunction 'and' to join two independent clauses. This is a standard and grammatically correct way to coordinate complete thoughts.

Step-by-Step Solution

1
Identify the two clauses in the sentence.
The first clause is 'Many species of mushrooms glow in the dark' (independent) and the second clause is 'this light attracts insects that help disperse their spores' (independent).
To determine the correct punctuation and conjunction, we must first know if the clauses are independent or dependent.
2
Determine the grammatical relationship needed to join two independent clauses.
Two independent clauses can be joined by a comma followed by a coordinating conjunction (such as 'and').
Joining them without a coordinating conjunction creates a comma splice, and using a subordinating conjunction like 'because' inappropriately can create a fragment or disrupt the logical flow.

Key Concept

Subordination and Coordination
Estimated Time:45s
Question 10Question →

In the early 1900s, Henrietta Leavitt cataloged variable stars at the Harvard College Observatory. Although she was initially hired as a "computer" to perform calculations, Leavitt's meticulous analysis of photographic plates led to the discovery of the period-luminosity relation. While this landmark finding allowed astronomers to measure the distance to far-off galaxies, but she was not widely recognized for her contributions during her lifetime.

Which of the following is the best replacement for the underlined portion of the sentence?

Show answer & explanation

Answer: While this landmark finding allowed astronomers to measure the distance to far-off galaxies, she was

Answer

The choice that retains the subordinating conjunction "While" at the beginning of the clause and removes the coordinating conjunction "but" before the second clause, separating them with a comma.
The correct option properly subordinates the first clause with the conjunction "While" and separates it from the independent clause with a comma, creating a grammatically correct complex sentence that expresses a clear contrast.

Step-by-Step Solution

1
Analyze the clause structure of the sentence.
The sentence attempts to link a dependent clause expressing concession/contrast with a main independent clause.
Identifying clause types helps determine whether subordinating or coordinating punctuation and conjunctions are needed.
2
Identify the grammatical error in the original sentence.
The original sentence uses both "While" (subordinating) and "but" (coordinating) to connect the same two clauses.
Using two conjunctions to connect two clauses is redundant and structurally invalid, leaving the sentence without a main independent clause.
3
Evaluate the choices to find the grammatically correct structure.
The correct option removes the coordinating conjunction "but" and retains the subordinating conjunction "While" to introduce the dependent clause, separating it from the independent clause with a comma.
This establishes a clear, grammatically correct relationship of contrast between the dependent clause and the independent clause.

Key Concept

Subordination and Coordination
Question 11Question →

Which of the following options best corrects the underlined portion in the sentence below?

While studying the physical adaptations of desert fauna, biologists noted that the heat-dispersing ears of the jackrabbit are much larger than the desert cottontail, this difference helps regulate body temperature in extreme climates.

Show answer & explanation

Answer: those of the desert cottontail, a difference that helps

Answer

those of the desert cottontail, a difference that helps
The correct option establishes a logical comparison by using the plural pronoun phrase 'those of' to refer back to the 'ears' of the jackrabbit, comparing them parallelly to the ears of the desert cottontail. It also avoids punctuation errors by using a comma to introduce the appositive phrase 'a difference that helps...', which correctly modifies the preceding comparison.

Step-by-Step Solution

1
Analyze the items being compared in the sentence.
The sentence compares 'the heat-dispersing ears of the jackrabbit' to 'the desert cottontail.'
An illogical comparison occurs when a specific trait or part of one subject is compared directly to another subject as a whole.
2
Select the correct plural possessive pronoun phrase to restore logical parallel comparison.
Since 'ears' is plural, the phrase 'those of' must be used to refer to the ears of the desert cottontail.
Using 'those of' ensures that ears are being compared to ears, satisfying the requirement for logical and parallel comparison.
3
Evaluate the grammatical structure and punctuation of the subsequent clause.
The final part of the sentence must avoid comma splices and fragment errors. The correct phrasing uses a comma to introduce 'a difference that helps...', which functions as a proper appositive phrase rather than an independent clause.
A semicolon requires independent clauses on both sides, which makes the semicolon choice incorrect because the following text is a fragment. The appositive structure is grammatically correct and punctuated properly.

Key Concept

Illogical and Incomplete Comparisons
Question 12Question →

Identify the option that best replaces the underlined portion of the following sentence:

'The preservation techniques utilized by modern paleontologists when uncovering fragile avian fossils are far more sophisticated <u>than early fossil hunters, who</u> often damaged specimens during excavation.'

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

Show answer & explanation

Answer: than those of early fossil hunters, who

Answer

the option that states 'than those of early fossil hunters, who'
The correct option replaces the underlined portion with a phrase that compares the plural noun 'preservation techniques' to 'those' (representing the techniques) of early fossil hunters, establishing a logical comparison. It also correctly uses a comma followed by the relative pronoun 'who' to introduce a dependent relative clause modifying the hunters.

Step-by-Step Solution

1
Identify the elements compared in the original sentence.
The sentence compares 'The preservation techniques utilized by modern paleontologists' to 'early fossil hunters'.
A logical comparison must compare items of the same category (e.g., techniques to techniques, not techniques to people).
2
Identify a plural pronoun reference to correct the illogical comparison.
Since 'preservation techniques' is plural, the pronoun 'those' must be used to refer back to it, resulting in the comparison 'than those of early fossil hunters'.
This establishes a parallel and logical comparison between modern techniques and historical techniques.
3
Evaluate the grammar of the rest of the clause.
The clause 'who often damaged specimens during excavation' is a relative dependent clause modifying the hunters, requiring a relative pronoun like 'who' preceded by a comma, not a personal pronoun (which creates a comma splice) or a semicolon (which creates a fragment).
Proper punctuation and clause joining prevent structural errors such as run-on sentences or fragments.

Key Concept

Illogical and Incomplete Comparisons
Question 13Question →

The following passage contains an underlined portion. Choose the option that best corrects the underlined portion to ensure proper subordination and coordination.

Although the geochemist initially hypothesized that the mineral deposits were formed by volcanic <u>activity; but subsequent isotopic analysis of the crystals revealed a freshwater origin, complicating</u> the team's geological timeline.

Which option is the most grammatically correct and effective choice for the underlined portion?

Show answer & explanation

Answer: activity, subsequent isotopic analysis of the crystals revealed a freshwater origin, complicating

Answer

activity, subsequent isotopic analysis of the crystals revealed a freshwater origin, complicating
The correct option correctly uses a comma to connect the introductory dependent clause ('Although the geochemist initially hypothesized...') to the main independent clause ('subsequent isotopic analysis of the crystals revealed a freshwater origin'). It also avoids the redundant coordinating conjunction 'but' and correctly sets off the modifying participial phrase ('complicating the team's geological timeline') with a comma rather than a semicolon or comma splice.

Step-by-Step Solution

1
Analyze the sentence structure and identify the dependent and independent clauses.
The sentence begins with the subordinating conjunction 'Although', which makes 'Although the geochemist initially hypothesized that the mineral deposits were formed by volcanic activity' a dependent clause. This dependent clause must be followed by an independent clause to form a complete sentence.
Identifying clause types is essential for determining appropriate punctuation and conjunctions.
2
Evaluate the punctuation and conjunctions connecting the first two clauses.
A dependent clause cannot be separated from the main clause by a semicolon. Furthermore, the subordinating conjunction 'Although' already establishes the contrast, so using the coordinating conjunction 'but' is redundant.
This eliminates the original phrasing (which uses both a semicolon and 'but') and establishes that a comma must follow 'activity' with no coordinating conjunction.
3
Evaluate the relationship of the final phrase to the rest of the sentence.
The final part of the sentence, 'complicating the team's geological timeline', is a participial phrase. It cannot be separated by a semicolon, as that would create a fragment. Additionally, replacing 'complicating' with 'this finding complicated' creates a new independent clause, which results in an ungrammatical comma splice when joined only by a comma.
This eliminates the options containing the semicolon before 'complicating' and the comma splice ending with 'this finding complicated'.

Key Concept

Subordination and coordination rules require that dependent clauses be joined to independent clauses using appropriate punctuation (usually commas) rather than semicolons, and without redundant conjunctions. Additionally, independent clauses cannot be spliced together with only a comma, and dependent phrases cannot be isolated by semicolons.
Question 14Question →

In the sentence below, the underlined portion contains a comparison error.

The primary feathers of a bald eagle are much larger and stiffer than a hawk.

Which of the following options corrects the comparison error in the sentence?

Show answer & explanation

Answer: those of a hawk

Answer

The correct option is the one stating 'those of a hawk' because it compares the feathers of a bald eagle to the feathers of a hawk.
The choice stating 'those of a hawk' correctly uses the plural pronoun 'those' to refer to the primary feathers of a hawk, establishing a logical comparison between feathers and feathers.

Step-by-Step Solution

1
Identify the items being compared in the sentence.
The sentence compares 'primary feathers' (plural noun) to 'a hawk' (singular noun).
This is necessary to check if the comparison is logical and grammatically correct.
2
Select the correct pronoun to represent the compared item.
Since 'primary feathers' is plural, the plural pronoun 'those' is needed to represent the hawk's feathers.
The pronoun must agree in number with the noun it replaces and make the comparison logical.

Key Concept

Illogical and Incomplete Comparisons
Estimated Time:45s
Question 15Question →

In the following sentence, a portion is underlined:

"The coordinates of the ancient ruins were far more difficult to decipher than the modern cartographers, and they required advanced satellite imaging to map accurately."

Which of the following options most effectively corrects the underlined portion to ensure a logical comparison and correct sentence structure?

Show answer & explanation

Answer: than those of modern cartographers, and they

Answer

The option that corrects the comparison using 'than those of modern cartographers' and avoids a comma splice by using ', and they'.
The correct option resolves the illogical comparison by replacing 'the modern cartographers' with the plural possessive pronoun 'those of', which correctly refers back to 'coordinates'. Additionally, it correctly joins the two independent clauses using a comma and the coordinating conjunction 'and' followed by the subject 'they', maintaining proper sentence structure.

Step-by-Step Solution

1
Identify the items being compared in the original sentence.
The sentence compares 'The coordinates of the ancient ruins' with 'the modern cartographers'.
This is illogical because coordinates (data points) cannot be compared to cartographers (people).
2
Choose the correct pronoun to complete a logical comparison.
Because 'coordinates' is a plural noun, the plural possessive pronoun 'those of' must be used to refer back to it, yielding 'than those of modern cartographers'.
This compares coordinates to coordinates, which is logically and grammatically sound.
3
Evaluate the grammar of the clauses and check for proper coordination.
The final clause ('they required advanced satellite imaging...') is independent. To join it to the preceding independent clause, we must use a comma and a coordinating conjunction (', and they').
Using just a comma results in a comma splice, and using 'and requiring' violates parallel structure by mixing a past-tense verb with a participle.

Key Concept

Illogical and Incomplete Comparisons
Estimated Time:1m 0s
Question 16Question →

The research team successfully isolated the gene responsible for the enzyme's production. A discovery that could lead to new treatments for metabolic disorders.

Which choice best corrects the underlined portion of the sentence?

Show answer & explanation

Answer: production, a discovery that could lead

Answer

production, a discovery that could lead
The correct option correctly replaces the period with a comma, turning the fragment into an appositive phrase that modifies 'production' and creating a single, grammatically correct sentence.

Step-by-Step Solution

1
Analyze the underlined portion to determine if a grammatical error exists.
The text following the period, 'A discovery that could lead to new treatments for metabolic disorders,' has no main verb. It is a sentence fragment.
A complete sentence requires a subject and a verb that expresses a complete thought.
2
Evaluate how to connect the fragment to the preceding independent clause.
Using a comma allows the phrase starting with 'a discovery' to act as an appositive modifying the noun 'production' in the main clause.
Appositive phrases must be joined to their independent clauses using a comma.
3
Verify that the other choices do not introduce new punctuation errors.
A semicolon requires independent clauses on both sides, which rules out the option using a semicolon. Using a comma with a subject-verb clause ('this discovery could lead') without a coordinating conjunction creates a comma splice, ruling out that option.
Eliminating options with semicolon errors and comma splices ensures the final choice is grammatically sound.

Key Concept

Correcting sentence fragments by integrating dependent phrases into the main clause using appropriate punctuation.
Question 17Question →

During the Middle Ages, crop rotation systems significantly increased food production in Europe, especially after the introduction of the three-field <u>system. Which allowed</u> farmers to leave only one-third of their land fallow each year, rather than half.

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

Show answer & explanation

Answer: system, which allowed

Answer

system, which allowed
The correct answer correctly attaches the dependent relative clause starting with 'which' to the main independent clause using a comma. This resolves the sentence fragment while maintaining proper punctuation for a non-essential relative clause.

Step-by-Step Solution

1
Analyze the underlined portion and the surrounding text to determine if it forms a complete sentence.
The clause starting with 'Which allowed' is a dependent relative clause that lacks a main independent subject-predicate structure. Separated by a period, it stands alone as a sentence fragment.
A dependent clause cannot stand alone as a complete sentence because it does not express a complete thought.
2
Evaluate the choices to find a version that connects the dependent clause to the main clause without creating punctuation errors.
Using a comma followed by the relative pronoun 'which' properly connects the non-restrictive relative clause to the preceding independent clause.
Non-restrictive relative clauses must be attached to the independent clause they modify using a comma.
3
Verify that other options introduce grammatical errors.
Replacing the period with a comma and 'this' results in a comma splice, while using a semicolon before 'which' creates a semicolon fragment.
Independent clauses cannot be joined with just a comma, and semicolons can only join two independent clauses.

Key Concept

Sentence Fragments
Question 18Question →

Urban heat islands present a growing challenge for modern climatologists. Because concrete and asphalt absorb more solar radiation than natural landscapes do. This phenomenon causes cities to experience significantly higher temperatures than their surrounding rural areas.

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

Show answer & explanation

Answer: climatologists because concrete and asphalt absorb more solar radiation than natural landscapes do. This

Answer

The correct choice is the option that joins the clauses without punctuation, creating a grammatically sound sentence.
The correct option removes the punctuation between 'climatologists' and the subordinating conjunction 'because', thereby integrating the dependent clause into the main clause and correcting the sentence fragment. It also keeps 'This' as the start of the next independent clause, creating two complete, grammatical sentences.

Step-by-Step Solution

1
Analyze the underlined portion to identify if it contains a sentence fragment.
The clause starting with the subordinating conjunction 'Because' is a dependent clause punctuated as a complete sentence, which forms a fragment.
Identifying the error type helps narrow down the correct grammatical structure required.
2
Evaluate the proposed options to determine which one connects the dependent clause to the preceding independent clause or makes it complete.
The correct choice removes the punctuation after 'climatologists' to seamlessly attach the dependent clause, forming a single grammatically correct sentence.
Connecting a dependent clause to its main clause eliminates the fragment.
3
Check the remaining options for other grammatical errors, such as comma splices or semicolon errors.
The option with the semicolon creates a semicolon fragment error, and the option with the comma splice incorrectly joins two independent clauses without a coordinating conjunction.
Verifying the distractors ensures that the chosen option is the only grammatically correct selection.

Key Concept

Recognizing and correcting sentence fragments by properly connecting dependent clauses to independent clauses.
Question 19Question →

The following passage is an excerpt from an essay about urban planning.

[1] The primary challenge facing the architectural firm was not the zoning restrictions or the budget limitations. But rather the community's resistance to the modern design, which many residents felt clashed with the historic character of the neighborhood. [2] In response, the lead architect proposed a series of public forums to address these concerns directly.

Which of the following options represents the most effective way to revise the underlined portion of the sentence to ensure that the passage is grammatically correct?

Show answer & explanation

Answer: limitations, but rather

Answer

limitations, but rather
The correct option resolves the sentence fragment by replacing the period with a comma. This joins the coordinating prepositional phrase ('but rather the community's resistance...') to the preceding independent clause, completing the parallel 'not... but rather' comparison within a single grammatically correct sentence.

Step-by-Step Solution

1
Analyze the underlined portion and the surrounding sentence structure.
The sentence ending in 'limitations' is complete, but the subsequent sentence beginning with 'But rather' lacks a subject and a finite verb, making it a sentence fragment.
To identify the grammatical error in the original passage.
2
Evaluate the relationship between the two parts of the sentence.
The passage presents a contrast using the correlative construction 'not [X] but rather [Y]', which requires the two elements to be contained within the same sentence.
To determine the appropriate grammatical connection between the contrasting elements.
3
Compare the punctuation options to connect the clauses correctly.
A comma is the correct punctuation mark to join these elements, whereas a semicolon would create a fragment and a period leaves the fragment unresolved.
To select the option that avoids both fragments and comma splices.

Key Concept

Sentence Fragments
Question 20Question →

The curators of the new exhibition decided that the gallery would not only feature paintings from the Renaissance period, but also it would showcase contemporary sculptures, and digital art installations were going to be displayed.

Which choice best maintains parallel structure in this sentence?

Show answer & explanation

Answer: but also showcase contemporary sculptures and display digital art installations

Answer

The choice that reads 'but also showcase contemporary sculptures and display digital art installations' is the correct answer.
The correct answer maintains parallel structure by ensuring that all three actions in the series follow the modal verb 'would' as base verbs ('feature,' 'showcase,' and 'display'). This creates a consistent and grammatically correct parallel sequence: 'would not only feature... but also showcase... and display...'

Step-by-Step Solution

1
Identify the initial parallel marker and its associated grammatical form.
The sentence begins a list of actions using 'would not only', followed by the base verb 'feature'.
Establishing the initial structure determines the grammatical form that the subsequent list items must match.
2
Locate the remaining components of the correlative and coordinate structures.
The correlative marker 'but also' and the coordinating conjunction 'and' introduce the second and third actions.
These conjunctions connect the parallel elements of the list together.
3
Choose the option that matches the base verb form of the first element.
The correct option must use the base verbs 'showcase' and 'display' to remain parallel to 'feature'.
Using the same grammatical form (base verbs following the modal verb 'would') ensures grammatical consistency and parallel structure.

Key Concept

Parallel Structure
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