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The number of smokers in China ________increased in recent years, and a number of them _________ the youth.

A.has; are B.have; are C.is; is D.are; are

A

解析试题分析:句意:最近几年,中国的吸烟的人的数量增加了,他们中的许多人都是年轻人。The number of…的数量,谓语动词用单数;a number of = many,许多的意思,谓语动词用复数,选A。
考点:考查固定用法

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