The number of chairs in the room __ ten. I’m afraid a number of chairs in the room ___ lost.
A．is; isB．is; areC．a(chǎn)re; isD．a(chǎn)re; are
B
此題重點考查the number of/a 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。（1）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(fù)數(shù)名詞，所以作主語時，謂語動詞用復(fù)數(shù)形式。（2）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)。
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