A large number of children ________ standing outside the office when I got there.  The number of the children _____ 2,500.

A．is; are

B．is ; is

C．a(chǎn)re ; is

D．a(chǎn)re ; are

 

【答案】

C

【解析】此題考查a number of與the number of的區(qū)別。它們修飾名詞作主語時，謂語的數(shù)是不一樣的。a number of為量詞短語，表示“許多……”，中心詞是這個短語所修飾的復數(shù)名詞，所以作主語時，謂語動詞用復數(shù)形式。the number of表示“……的數(shù)量”，中心詞為number，指的是of后邊名詞的數(shù)量，數(shù)量是個抽象概念，因此謂語動詞用單數(shù)。根據(jù)語境的含義可知選擇C。

 

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