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
网友回答
(答案→)A. has; are
B. have; are
C. is; is
D. are; are
解析：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。