问题
选择题
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
答案
答案：A
题目分析：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。
