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Question

Difficulty: MediumSubject-Verb Agreement

Read the following passage about textile conservation:

The delicate restoration of medieval tapestries, which involves stabilizing microscopic silk fibers and repairing dye degradation, demand decades of experience and specialized training. Conservators must work in climate-controlled rooms to prevent humidity from causing further decay to the historic threads.

Which option is the correct grammatical replacement for the underlined word?

  1. A
    NO CHANGE
  2. demandsAnswer
  3. C
    are demanding
  4. D
    demanded

Answer

The option 'demands' is correct because it uses the singular verb form to agree with the singular subject 'restoration'.
The singular verb 'demands' is correct because it agrees with the singular subject 'restoration'. The intervening prepositional phrase 'of medieval tapestries' and relative clause 'which involves...' do not change the number of the subject. The present tense maintains consistency with the next sentence.

Step-by-Step Solution

1
Identify the true subject of the sentence containing the underlined verb.
The subject is 'restoration', which is singular.
The plural nouns 'tapestries', 'fibers', and 'degradation' are part of intervening prepositional phrases or relative clauses and do not affect the subject's grammatical number.
2
Determine the correct verb form and tense based on the subject and the surrounding context.
The verb must be singular ('demands') and in the present tense to match the surrounding sentence ('Conservators must work...').
Subject-verb agreement requires a singular verb for a singular subject, and verb tense consistency requires keeping the sentence 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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