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Question 381Question →

In the context of the sentence below, which of the following choices best maintains pronoun case and person consistency?

In the latest issue of the culinary journal, the chef noted that if one wants to master the art of classic French baking, the preparation of the delicate chocolate soufflé should be left to the head pastry cook and he, since you must monitor the oven temperature with absolute precision.

Show answer & explanation

Answer: him, since one

Answer

The correct choice is the one that uses 'him, since one', which correctly uses the objective pronoun case for the compound object and maintains person consistency.
The correct choice is the option that replaces the underlined portion with 'him, since one'. First, the pronoun is part of the compound object of the preposition 'to', which requires the objective pronoun 'him' instead of the subjective pronoun 'he'. Second, the sentence establishes a third-person perspective with 'if one wants', so to prevent an inconsistent shift in person, the subsequent pronoun must be 'one' rather than the second-person 'you'.

Step-by-Step Solution

1
Analyze the pronoun case required in the phrase 'should be left to the head pastry cook and he'.
The pronoun is part of a compound object following the preposition 'to'. Prepositions require objective case pronouns, so 'he' must be changed to 'him'.
To ensure grammatical case agreement for compound objects.
2
Analyze the pronoun person/perspective consistency across the sentence.
The sentence begins with the third-person perspective 'if one wants', which means any subsequent general pronoun must also use 'one' rather than shifting to the second-person 'you'.
To avoid shift in person errors and maintain a consistent narrative perspective.

Key Concept

Pronoun Case and Person

Alternative Method

To check pronoun case in a compound structure, try reading the sentence with only the pronoun in question: 'left to him' instead of 'left to the head pastry cook and he'. This simplifies the construction and helps identify the correct objective pronoun case.
Estimated Time:45s
Question 382Question →

The sentence below contains a blank where a pronoun is missing. What pronoun correctly completes the sentence to ensure proper pronoun-antecedent agreement?

Fill in the blanks below

While the engineers monitored the telemetry data, each of the spacecraft's main propulsion engines reached maximum thrust capacity during the static fire test.
Show answer & explanation

Answer

its
The correct answer is the singular possessive pronoun 'its'. The antecedent of the pronoun is the singular indefinite pronoun 'each'. The plural noun 'engines' in the intervening prepositional phrase does not change the grammatical number of the subject 'each', which requires a singular pronoun.

Step-by-Step Solution

1
Identify the pronoun's antecedent in the sentence.
The antecedent is the indefinite pronoun 'each'.
The pronoun refers back to the subject of the clause, which is 'each of the spacecraft's main propulsion engines'. In this structure, the singular indefinite pronoun 'each' acts as the true antecedent, while the prepositional phrase 'of the spacecraft's main propulsion engines' serves only to modify it.
2
Determine the number and gender/animacy of the antecedent.
The antecedent 'each' is singular and refers to inanimate objects (engines).
Indefinite pronouns like 'each', 'every', 'neither', and 'either' are grammatically singular, even when followed by a prepositional phrase containing a plural noun like 'engines'.
3
Select the possessive pronoun that matches the singular, inanimate antecedent.
The correct possessive pronoun is 'its'.
To maintain proper pronoun-antecedent agreement, a singular, third-person neuter possessive pronoun ('its') must be used.

Key Concept

Pronoun-Antecedent Agreement with Indefinite Pronouns
Estimated Time:1m 0s
Question 383Question →

Read the passage below and consider the underlined word:

Cephalopods, such as octopuses and cuttlefish, possess specialized skin cells called chromatophores that allow them to change color rapidly. When predators approach, these creatures can blend seamlessly into their surroundings or display warning patterns. This is key to their survival in the open ocean, where shelter is scarce.

Which of the choices best replaces the underlined word to make the reference clear and precise?

Show answer & explanation

Answer: This behavior

Answer

This behavior
The correct option replaces the vague pronoun with a specific noun phrase. In the original sentence, the pronoun has no clear, single noun antecedent, as it refers broadly to the actions of blending in or displaying warning patterns. Adding the noun 'behavior' makes the reference precise.

Step-by-Step Solution

1
Analyze the underlined word in context and identify any grammatical errors or clarity issues.
The underlined word is the demonstrative pronoun 'This', which is used as the subject of the sentence. Looking at the preceding sentence, there is no single noun that 'This' refers to. Instead, it refers vaguely to the actions of blending in or displaying warning patterns.
This step helps identify that the core issue is a vague pronoun reference.
2
Evaluate the answer choices to find the one that establishes a clear and precise reference without introducing new grammatical errors.
Replacing 'This' with 'This behavior' provides a clear noun ('behavior') that the demonstrative adjective modifies, resolving the vague reference. The other options either maintain the vague reference ('NO CHANGE' and 'It') or create a sentence fragment ('Which').
This step confirms the grammatically correct and clearest choice.

Key Concept

Pronoun Clarity and Reference
Question 384Question →

The behavior of these deep-sea organisms, including the bioluminescent lanternfish that inhabit the midnight zone, remain a mystery to marine biologists. Research expeditions continue to discover new species in these extreme environments.

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

Show answer & explanation

Answer: remains

Answer

remains
The singular verb 'remains' correctly agrees with the singular subject 'behavior'. The intervening prepositional phrase 'of these deep-sea organisms' and the parenthetical element 'including the bioluminescent lanternfish that inhabit the midnight zone' contain plural nouns ('organisms', 'lanternfish') but do not alter the singular nature of the subject.

Step-by-Step Solution

1
Identify the true grammatical subject of the sentence by stripping away intervening prepositional and parenthetical phrases.
The subject is the singular noun 'behavior' (from 'The behavior of these deep-sea organisms...').
Identifying the true subject prevents matching the verb to distraction nouns like 'organisms' or 'lanternfish'.
2
Determine the correct number (singular or plural) for the verb to match the subject.
Since the subject 'behavior' is singular, the verb must be singular.
Subject-verb agreement requires a singular subject to take a singular verb.
3
Check the surrounding context to determine the appropriate tense.
The context is in the present tense (e.g., 'continue' in the next sentence), so the verb should be in the present tense ('remains').
This avoids unnecessary or illogical tense shifts.

Key Concept

Subject-verb agreement requires a verb to agree in number with its subject, even when separated by intervening prepositional phrases, appositives, or parenthetical information.
Question 385Question →

In the seventeenth century, the Dutch tulip market experienced an unprecedented boom. Wealthy investors and ordinary citizens alike traded rare bulbs for exorbitant prices, hoping to secure fortunes overnight. They speculated on future harvests, pledged their estates as collateral, and are creating one of history's first recorded financial bubbles. Ultimately, the market collapsed in 1637, leaving many families in financial ruin.

Which of the following choices for the underlined portion best maintains a consistent verb tense and parallel structure in the sentence?

Show answer & explanation

Answer: created

Answer

The correct answer is the option that uses the simple past tense verb 'created' to maintain consistency with the other past tense verbs in the series.
The correct choice uses the simple past tense verb 'created' to match the verbs 'speculated' and 'pledged'. This maintains parallel structure in the list of actions and avoids an unnecessary shift in verb tense.

Step-by-Step Solution

1
Identify the parallel elements in the list within the third sentence.
The sentence lists three actions performed by the subjects: (1) 'speculated on future harvests', (2) 'pledged their estates as collateral', and (3) the underlined portion.
Identifying parallel structures is necessary to ensure consistent grammatical construction across all items in a series.
2
Determine the tense of the verbs that are already established in the series.
The verbs 'speculated' and 'pledged' are both in the simple past tense.
To maintain parallel structure and prevent illogical construction shifts, the final verb in the series must match the simple past tense of the preceding verbs.
3
Evaluate the choices to find the verb form that maintains consistency and parallel structure.
The simple past tense verb 'created' matches 'speculated' and 'pledged', resolving the grammatical shift.
Choosing the past tense verb completes the parallel list in a grammatically consistent manner.

Key Concept

Shifts in Construction (Verb Tense Consistency and Parallelism)
Question 386Question →

To prepare for the spring planting season, the gardeners moved the young tomato plants into the new brick raised beds. They had been constructed out of recycled materials to minimize environmental impact. The team hoped that this sustainable approach would yield a bountiful harvest of organic vegetables.

Which choice most clearly and precisely identifies what was constructed out of recycled materials?

Show answer & explanation

Answer: The beds

Answer

The beds
Replacing the pronoun with the specific noun phrase 'The beds' removes all ambiguity, making it clear that the raised beds—rather than the tomato plants—were constructed from recycled materials.

Step-by-Step Solution

1
Identify the underlined pronoun and locate its potential antecedents in the preceding sentence.
The pronoun is 'They', and the preceding sentence contains two plural nouns that could act as its antecedent: 'plants' and 'beds'.
This step determines whether the pronoun is ambiguous by seeing if it could logically refer to multiple nouns.
2
Evaluate the choices to find the one that clarifies the noun being referenced without creating grammatical errors.
Replacing 'They' with the specific noun phrase 'The beds' removes the ambiguity. The options 'It' and 'Which' create new grammatical errors.
Using a specific noun resolves pronoun ambiguity and ensures the sentence is clear and grammatically correct.

Key Concept

Pronoun clarity and reference require that every pronoun has a single, clear, and grammatically matching noun antecedent to avoid ambiguity.
Question 387Question →

Deep beneath the forest floor, a complex network of fungal threads known as mycelium connects the roots of different trees. Through this network, trees can share vital nutrients, they also warn neighboring plants of impending pest attacks.

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

Show answer & explanation

Answer: nutrients while warning

Answer

The correct option is the one that replaces 'nutrients, they also warn' with 'nutrients while warning'.
The correct choice properly subordinates the warning action by using the subordinating conjunction 'while' and the participle 'warning'. This removes the comma splice and connects the two ideas into a single, cohesive, grammatically correct sentence.

Step-by-Step Solution

1
Analyze the relationship between the clause 'trees can share vital nutrients' and the clause 'they also warn neighboring plants...'
Both clauses are independent because they both contain a subject and a verb and express complete thoughts.
Identifying clause types is necessary to determine how they can be grammatically connected.
2
Evaluate the methods used in each option to connect these clauses.
A comma alone creates a comma splice. A semicolon followed by 'because' creates a fragment. However, converting the second clause into a dependent phrase using 'while warning' correctly subordinates the second action to the main clause.
Proper subordination eliminates punctuation errors and establishes a clear logical flow.

Key Concept

Subordination and Coordination
Estimated Time:45s
Question 388Question →

For decades, scholars believed that the ancient Cretan script known as Linear B was an early form of Etruscan or Basque. Michael Ventris, an English architect who pursued decipherment as a hobby, proposed a different theory; although he suggested that the tablets were written in an archaic dialect of Greek, but many experts initially dismissed this hypothesis.

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

Show answer & explanation

Answer: although he suggested that the tablets were written in an archaic dialect of Greek, many experts initially dismissed this hypothesis.

Answer

The choice that uses the subordinating conjunction 'although' to introduce a dependent clause followed by a comma and a main independent clause, without any coordinating conjunctions or punctuation errors.
The correct answer properly structures the sentence by using the subordinating conjunction 'although' to introduce a dependent clause, which is then separated from the main independent clause by a comma. This creates a grammatically correct complex sentence without redundant conjunctions.

Step-by-Step Solution

1
Analyze the relationship between the clauses in the underlined portion.
The two clauses express contrasting ideas: Ventris proposing that the tablets were written in Greek, and experts dismissing this idea.
Understanding the logical connection between the ideas helps determine the correct conjunctions to use.
2
Evaluate the original text (NO CHANGE) for grammatical errors.
The original text uses both 'although' (subordinating) and 'but' (coordinating) to connect the clauses. This double-conjunction structure is redundant and incorrect.
Only one conjunction is needed to establish the relationship between a dependent and an independent clause.
3
Examine the remaining options for structure and punctuation correctness.
The option using a semicolon is followed by a fragment ('dismissing' is not a finite verb). The option using only a comma creates a comma splice. The option with 'although' and a comma correctly subordinates the first clause and coordinates the sentence.
Eliminating grammatically incorrect structures leaves the only correct and standard punctuation option.

Key Concept

Subordination and Coordination
Estimated Time:1m 0s
Question 389Question →

Giant kelp forests grow rapidly along the rocky coastlines of the Pacific Ocean. Providing critical shelter and food for hundreds of marine species.

Which of the following options is the correct choice for the underlined portion of the sentence?

Show answer & explanation

Answer: Ocean, providing

Answer

The correct answer is 'Ocean, providing' because it connects the participial phrase to the preceding independent clause with a comma, correcting the sentence fragment.
The option containing 'Ocean, providing' is correct because it uses a comma to properly join the participial phrase 'providing critical shelter and food for hundreds of marine species' to the main independent clause, creating a grammatically complete and coherent sentence.

Step-by-Step Solution

1
Identify the grammatical role of the underlined portion and the surrounding clauses.
The first part of the sentence, 'Giant kelp forests grow rapidly along the rocky coastlines of the Pacific Ocean,' is an independent clause. The second part, 'Providing critical shelter and food for hundreds of marine species,' is a participial phrase lacking a subject and a finite verb, making it a fragment when separated by a period.
To determine if a sentence fragment exists, we must analyze whether each clause can stand alone as a complete sentence.
2
Evaluate the options to determine how to correctly join the participial phrase to the independent clause.
Using a comma to attach the participial phrase ('Ocean, providing') integrates it as a modifier describing the kelp forests, creating a single, grammatically correct sentence.
A participial phrase can be joined to an independent clause using a comma to avoid a sentence fragment.
3
Eliminate grammatically incorrect options.
The original option creates a fragment. The option with 'Ocean, they provide' creates a comma splice. The option with 'Ocean; providing' incorrectly uses a semicolon to introduce a dependent phrase.
Ensuring the sentence contains no fragments, comma splices, or semicolon fragments guarantees grammatical correctness.

Key Concept

Recognizing and correcting sentence fragments
Estimated Time:45s
Question 390Question →

Unlike his contemporaries, who focused solely on planetary positions, Kepler's laws of planetary motion were derived from Tycho Brahe’s observational data, which revolutionized astronomy.

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

Show answer & explanation

Answer: Kepler derived his laws of planetary motion from Tycho Brahe's observational data, a breakthrough that

Answer

Kepler derived his laws of planetary motion from Tycho Brahe's observational data, a breakthrough that
The correct option resolves the dangling modifier by placing the proper noun 'Kepler' directly after the comma, which ensures that the introductory phrase 'Unlike his contemporaries' logically describes him. It also maintains a complete, grammatically sound sentence structure by avoiding fragments and comma splices.

Step-by-Step Solution

1
Identify the introductory modifying phrase and the noun it modifies.
The phrase 'Unlike his contemporaries, who focused solely on planetary positions' must logically modify a person (Kepler) rather than an inanimate object or concept (Kepler's laws).
Correct modifier placement requires the introductory phrase to immediately precede the noun it describes to avoid illogical comparisons.
2
Evaluate the grammar of the rest of the sentence for each option that corrects the modifier.
The option beginning with 'Kepler derived...' resolves the modifier error and forms a grammatically sound independent clause, while the appositive phrase at the end avoids punctuation errors.
Ensuring the sentence is free of comma splices and fragments is necessary when changing the clause structure to fix the modifier.

Key Concept

Introductory Modifier Placement
Question 391Question →

To prepare for the spring harvest, the garden coordinator asked my neighbor and I to plant the heirloom tomato seeds.

Which of the following is the correct replacement for the underlined word?

Show answer & explanation

Answer: me

Answer

me
The correct answer is the objective case pronoun because it functions as part of the compound direct object of the verb 'asked'. If the other member of the compound object ('my neighbor') is removed, the error in the subjective pronoun becomes clear ('asked I to plant' vs. 'asked me to plant').

Step-by-Step Solution

1
Determine the grammatical function of the underlined pronoun in the sentence.
The pronoun, along with 'my neighbor', serves as the direct object of the verb 'asked'.
Identifying the pronoun's role helps determine whether it must be in the subjective or objective case.
2
Select the appropriate pronoun case for the object position.
The objective case pronoun 'me' must be used instead of the subjective case 'I'.
Objects of verbs require objective pronouns.

Key Concept

Pronoun Case in Compound Objects
Question 392Question →

Beneath the forest floor, a complex network of fungal threads connects individual trees. These fungi provide trees with essential nutrients, and they receive sugars in return.

Which of the following is the best version of the underlined portion of the sentence?

Show answer & explanation

Answer: These fungi provide trees with essential nutrients, and

Answer

The correct choice is the original phrasing, which uses a comma and the coordinating conjunction 'and' to join two independent clauses.
The sentence contains two independent clauses: 'These fungi provide trees with essential nutrients' and 'they receive sugars in return.' To connect two independent clauses, we must use a comma followed by a coordinating conjunction (like 'and'), a semicolon, or split them into two sentences. The original phrasing correctly uses a comma and 'and' to join them, maintaining grammatical correctness and logical flow.

Step-by-Step Solution

1
Identify the clause structure of the sentence.
The sentence consists of two clauses: 'These fungi provide trees with essential nutrients' and 'they receive sugars in return.' Both are independent clauses because they can stand alone as complete thoughts.
Knowing the types of clauses helps determine the appropriate punctuation and conjunctions needed to join them.
2
Evaluate the options for connecting two independent clauses.
Two independent clauses can be joined by a comma and a coordinating conjunction (such as 'and'), a semicolon, or separated into two sentences. The original text uses ', and' which is grammatically correct and logically sound.
This helps identify correct coordination and eliminates options that violate punctuation rules, such as comma splices or fragments.

Key Concept

Subordination and Coordination
Estimated Time:45s
Question 393Question →

Located high in the Canadian Rockies, the Burgess Shale contains some of the world's most well-preserved fossils. Because these organisms were buried rapidly in a mudslide, preventing decay. Consequently, they offer an unprecedented glimpse into the Cambrian explosion, a period when major animal groups first appeared in the fossil record.

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

Show answer & explanation

Answer: fossils. These organisms were buried rapidly in a mudslide, preventing decay

Answer

The correct choice is the option that ends the first sentence with a period and starts the next sentence with 'These organisms were buried...', creating two complete, independent sentences.
The correct option correctly resolves the sentence fragment by removing the subordinating conjunction 'because' and starting a new independent sentence. This creates two complete and grammatically correct sentences: one ending with 'fossils' and the next beginning with 'These organisms'.

Step-by-Step Solution

1
Identify the grammatical issue in the original sentence.
The clause starting with 'Because' is a dependent clause and cannot stand alone as a sentence, making it a sentence fragment.
A dependent clause requires a main independent clause to form a complete sentence.
2
Evaluate the choices to find a version that resolves the fragment and maintains proper grammar.
Removing the subordinating conjunction 'because' turns the second clause into an independent clause: 'These organisms were buried rapidly in a mudslide, preventing decay.' This independent clause can then be separated from the first independent clause using a period.
A period is the correct punctuation to separate two independent clauses.
3
Verify that other options do not introduce new grammatical errors.
Joining them with a semicolon and keeping 'because' creates a semicolon fragment. Joining them with a comma creates a comma splice.
Semicolons require independent clauses on both sides, and commas cannot join two independent clauses without a coordinating conjunction.

Key Concept

Correcting sentence fragments by ensuring all sentences contain at least one independent clause and are punctuated correctly.
Estimated Time:45s
Question 394Question →

While searching for a rare manuscript in the library's archives, a misplaced letter written by George Washington was discovered by the researcher.

Which of the following versions of the underlined portion makes the sentence grammatically correct?

Show answer & explanation

Answer: the researcher discovered a misplaced letter written by George Washington

Answer

the researcher discovered a misplaced letter written by George Washington
The correct answer resolves the dangling modifier by placing the logical subject, the researcher, immediately after the introductory modifying phrase. This makes it clear that the researcher was the one searching for the manuscript, and it completes the sentence with a clear active verb.

Step-by-Step Solution

1
Identify the introductory modifying phrase and determine what or who it modifies.
The phrase 'While searching for a rare manuscript in the library's archives' describes an action that must be performed by a person (the researcher).
An introductory modifier must logically modify the subject that immediately follows the comma.
2
Select the option that places the logical subject immediately after the comma without introducing new grammatical errors.
Placing 'the researcher discovered...' immediately after the comma resolves the dangling modifier and forms a complete sentence.
This establishes clear subject-modifier relationship and maintains proper independent clause structure.

Key Concept

Introductory dangling modifiers occur when the subject performing the action in the introductory phrase is not placed immediately after the comma.
Estimated Time:45s
Question 395Question →

For centuries, astronomers have looked to the night sky to understand the universe. The main mirror of the giant telescopes need to be cleaned regularly to prevent dust from blocking faint starlight.

Which option is the correct form of the underlined verb to ensure proper subject-verb agreement?

Show answer & explanation

Answer: needs

Answer

The correct form is the singular verb 'needs' to agree with the singular subject 'mirror'.
The subject of the sentence is the singular noun 'mirror.' The prepositional phrase 'of the giant telescopes' separates the subject from the verb but does not change the subject's number. Therefore, a singular verb is required. The verb 'needs' is the correct singular form that matches the subject in the present tense.

Step-by-Step Solution

1
Identify the subject of the sentence containing the underlined verb.
The subject is the singular noun 'mirror'. The phrase 'of the giant telescopes' is a prepositional phrase that modifies the subject but does not change its number.
Verbs must agree with their grammatical subject, not with nouns inside modifying prepositional phrases.
2
Determine the correct verb form that agrees with the singular subject in the present tense.
The singular form of the verb in the simple present tense is 'needs'.
A singular subject requires a singular verb.

Key Concept

Subject-Verb Agreement with Intervening Phrases
Estimated Time:45s
Question 396Question →

The root systems of desert cacti, which are shallow but widespread to maximize water absorption, are much more extensive than a tropical rainforest plant.

Which choice best completes the sentence to ensure the comparison is logical and grammatically correct?

Show answer & explanation

Answer: those of tropical rainforest plants

Answer

The correct choice is 'those of tropical rainforest plants' because it uses the plural pronoun 'those' to refer back to 'root systems,' establishing a logical and grammatically parallel comparison.
The correct choice compares 'the root systems of desert cacti' to 'those of tropical rainforest plants' using the plural pronoun 'those' to refer to 'root systems.' This establishes a clear, parallel, and logical noun-to-noun comparison.

Step-by-Step Solution

1
Identify the two elements being compared in the sentence.
The sentence compares 'the root systems of desert cacti' to the underlined portion.
Comparing a physical feature ('root systems') to a whole organism ('a tropical rainforest plant') is illogical; the sentence must compare root systems to root systems.
2
Determine the correct pronoun to represent the comparison target without repeating the noun.
Since 'root systems' is plural, the plural pronoun 'those' must be used.
This ensures grammatical agreement and parallel structure in the comparison.
3
Evaluate the choices to find the one that establishes a logical comparison without introducing other grammatical errors.
The choice 'those of tropical rainforest plants' correctly uses 'those' to refer to root systems and avoids run-on or comma splice errors.
Other options either maintain the illogical comparison or introduce independent clauses incorrectly joined by a comma.

Key Concept

Illogical and Incomplete Comparisons
Question 397Question →

Read the passage below. To maintain consistency in grammatical construction and mood throughout the passage, what form of the verb 'stain' should be written in the blank?

Fill in the blanks below

When preparing a specimen for electron microscopy, first slice the tissue into extremely thin sections, and then rinse the sample with a buffering solution. Once the sample is prepared, it with a heavy metal stain to enhance the contrast of the cellular structures.
Show answer & explanation

Answer

stain
The passage establishes a sequence of instructions using the imperative mood ('slice' and 'rinse'). To maintain consistency in construction and mood, the blank must also use the imperative form of the verb. The base form 'stain' functions as a command, thereby preserving the parallel grammatical structure of the directions.

Step-by-Step Solution

1
Analyze the grammatical mood and construction of the preceding sentences and clauses in the passage.
The initial instructions use the imperative mood ('first slice... and then rinse...'), which issues direct commands without an explicit subject.
This establishes the established pattern of construction (imperative mood) for the instructional passage.
2
Identify the construction shift that would occur if other moods or structures were used.
Inserting indicative phrases like 'you should stain' or gerunds like 'staining' would shift the construction away from the imperative mood.
Maintaining consistent construction prevents a jarring shift in the author's tone and sentence structure.
3
Determine the correct form of the target verb 'stain' that maintains the imperative mood.
The base form 'stain' functions as an imperative verb, maintaining parallel construction with 'slice' and 'rinse'.
This completes the sentence while preserving grammatical consistency throughout the passage.

Key Concept

Shifts in Construction (Mood Consistency)
Question 398Question →

To correct the dangling modifier in the sentence, complete the blank with the logical subject that performs the action of the introductory phrase. Choose either 'the students' or 'the laboratory tables'.

Fill in the blanks below

Having finished the chemistry lab experiment, wiped down the workspace with disinfectant.
Show answer & explanation

Answer

the students
The introductory phrase 'Having finished the chemistry lab experiment' describes an action that must be performed by a logical agent. The students are capable of finishing an experiment, so placing 'the students' immediately after the modifying phrase correctly associates the modifier with its subject.

Step-by-Step Solution

1
Identify the introductory modifying phrase and the action it describes.
The introductory phrase is 'Having finished the chemistry lab experiment,' which describes the action of completing an experiment.
An introductory participial phrase must modify the subject that directly follows it.
2
Determine which noun logically performs this action.
The students are the logical agents who can perform and finish a chemistry experiment.
Placing 'the laboratory tables' immediately after the comma would create a dangling modifier, because tables cannot perform or finish an experiment.

Key Concept

An introductory modifying phrase must be immediately followed by the noun it logically modifies to avoid a dangling modifier.
Question 399Question →

What is the correct present-tense form of the verb remain that should fill the blank to maintain proper subject-verb agreement?

Fill in the blanks below

Deep within the vault of the national archives, alongside the treaties and diplomatic correspondence from the turn of the century, the original diaries of the lead negotiator.
Show answer & explanation

Answer

remain
The correct answer is the plural verb 'remain' because the true subject of the verb is the plural noun 'diaries.' In this inverted sentence, the verb precedes the subject. Nouns in the preceding prepositional phrases, such as 'negotiator,' 'correspondence,' or 'century,' are singular but do not affect the agreement, as they are not the subject of the clause.

Step-by-Step Solution

1
Locate the subject of the verb in the sentence.
The subject is 'the original diaries of the lead negotiator,' which follows the verb in this inverted sentence structure.
Inverted sentences place the subject after the verb, making it crucial to look past preceding prepositional phrases to find the true subject.
2
Determine the grammatical number of the head noun of the subject.
The head noun is 'diaries,' which is plural.
The number of the head noun determines whether the verb must be singular or plural.
3
Select the correct present-tense form of the verb 'remain' that matches the plural subject.
The plural present-tense form is 'remain' (not the singular 'remains').
A plural subject requires a plural verb to maintain proper subject-verb agreement.

Key Concept

Subject-Verb Agreement
Question 400Question →

To prepare a healthy garden, a gardener first tills the soil and clears out any weeds. Next, the gardener added compost to enrich the soil before planting the seeds. Finally, watering the beds regularly ensures that the plants grow strong.

Which of the following options, if substituted for the underlined word, best maintains a consistent verb tense in the passage?

Show answer & explanation

Answer: adds

Answer

adds
The correct answer is the word 'adds' because it is in the simple present tense. This matches the tense of the other verbs in the passage—'tills,' 'clears,' and 'ensures'—maintaining a consistent and logical timeframe throughout.

Step-by-Step Solution

1
Analyze the verbs in the surrounding sentences of the passage to identify the established timeframe.
The verbs 'tills' and 'clears' in the first sentence and 'ensures' in the third sentence are all in the simple present tense.
Establishing the dominant tense of the passage is necessary to recognize any inconsistent shifts in construction.
2
Evaluate the underlined verb 'added' against the established present-tense timeframe.
The verb 'added' is in the past tense, which represents a shift in construction from the present tense used elsewhere.
An unnecessary shift in verb tense disrupts the flow and logic of the passage.
3
Select the option that corrects this shift by putting the verb in the simple present tense.
The word 'adds' is in the simple present tense and matches the grammatical construction of the other sentences.
Using the present tense maintains consistency and ensures grammatical agreement across the entire passage.

Key Concept

Avoiding unnecessary shifts in verb tense to maintain grammatical consistency within a passage.
Estimated Time:40s
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