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Question

Difficulty: MediumSubject-Verb Agreement

The passage below describes a challenge in botanical research. Which present-tense form of the verb 'to require' correctly completes the sentence to maintain proper subject-verb agreement?

Answer:In modern botany, the collection of rare specimens from remote mountain ranges 【requires】 months of grueling travel and meticulous planning by dedicated researchers.

Answer

requires
The correct answer is 'requires' because the singular subject 'collection' must agree with a singular verb in the present tense. Intervening prepositional phrases do not affect the grammatical number of the subject.

Step-by-Step Solution

1
Identify the true grammatical subject of the sentence.
The subject is 'collection', which is a singular noun.
Prepositional phrases that follow a subject, such as 'of rare specimens' and 'from remote mountain ranges', are modifiers and do not change the grammatical number of the subject.
2
Select the verb form of 'to require' that matches the singular subject in the present tense.
The correct form is 'requires'.
Singular subjects must be paired with singular verbs (verbs ending in 's' in the third-person present tense) to ensure proper subject-verb agreement.

Key Concept

Subject-Verb Agreement
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Topics

Subject-Verb Agreement

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