16Hit1600
Standard English ConventionsEasy–MediumSubject-verb agreement

Standard English Conventions practice question

Which choice completes the text so that it conforms to the conventions of Standard English? The collection of rare stamps ____ displayed in a locked glass case near the museum entrance.

  1. A. are
  2. B. isCorrect
  3. C. were
  4. D. have been

Answer: B. is

The subject is 'collection' (singular), not 'stamps'. A singular subject takes 'is'. The plural noun in the prepositional phrase 'of rare stamps' is a deliberate distractor.

Why the other answers are wrong

A. are
You matched the verb to 'stamps,' the noun right before the blank, but 'stamps' sits inside the prepositional phrase 'of rare stamps' — the subject is the singular 'collection,' so you need 'is.'
C. were
'Were' is plural and also shifts to past tense; the subject is the singular 'collection' (not 'stamps'), and the sentence describes a present state, so 'is' is correct.
D. have been
'Have been' is plural, agreeing with 'stamps' rather than the actual subject 'collection,' which is singular and takes 'is.'

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