A number of books in the library ____ been stolen so that the number of them ____ smaller than before.

A. has, are B. has, is

C. have, is D. have, are

C

【解析】試題分析：考查謂語動詞單復(fù)數(shù)。a number of 意思是“許多...”，后接復(fù)數(shù)名詞，謂語通常用復(fù)數(shù)；the number of 意思是“.....的總數(shù)”，后接復(fù)數(shù)名詞，但謂語要用單數(shù)，句意：在圖書館很多書已經(jīng)被偷了因此書的總數(shù)比以前更少了。故選C

考點(diǎn)：考查謂語動詞單復(fù)數(shù)

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