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Question

Difficulty: MediumSubject-Verb Agreement

Although many people believe that libraries are becoming obsolete in the digital age, recent data suggests otherwise. In fact, a modern library with its extensive digital archives, community workshops, and collaborative workspaces serves as a vital hub for neighborhood interaction.

Which of the following choices is the best replacement for the underlined word?

  1. NO CHANGEAnswer
  2. B
    serve
  3. C
    are serving
  4. D
    served

Answer

NO CHANGE
The singular subject of the sentence is 'library'. The phrase starting with 'with' is a prepositional phrase that modifies the subject but does not change its number. Therefore, the verb must be singular. The present-tense verb 'serves' correctly agrees with the singular subject and maintains the present-tense context established in the rest of the passage.

Step-by-Step Solution

1
Identify the subject of the verb in the sentence.
The subject is 'a modern library', which is singular.
To ensure subject-verb agreement, we must ignore the intervening prepositional phrase ('with its extensive digital archives, community workshops, and collaborative workspaces') and focus only on the main subject.
2
Determine the correct verb form and tense.
The singular present-tense verb 'serves' is required.
The surrounding context uses the present tense ('are becoming', 'suggests'), so the verb must be singular and in the present tense.

Key Concept

Subject-Verb Agreement with Intervening Phrases
Estimated Time:1m 0s
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Topics

Subject-Verb Agreement

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