The number of chairs in the room __ ten....

The number of chairs in the room __ ten. I’m afraid a number of chairs in the room ___ lost.

A. is; is B. is; are

C. are; is D. are; are

B 【解析】试题分析：句意:房间里椅子的数量是十个。恐怕房间里的一些椅子丢了。the number of…，……的数量，修饰名词，在句中做主语时，谓语动词用单数；a number of 一些，很多，修饰名词，在句中做主语时，谓语动词用复数。故选B。考点：考查主谓一致。

考点分析：

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