Cars play an important role in modem life, but they also cause many problems like air poll

发布时间：2020-08-16 15:47:23

Cars play an important role in modem life, but they       also cause many problems like air pollution.
A. should
B. can
C. must
D. will

网友回答

A. should
(答案→)B. can
C. must
D. will
解析：考查情态动词。句意：小汽车在现代生活中起着重要的作用，但它们也可能引起像污染等许多问题。故用情态动词can，选B。
以上问题属网友观点，不代表本站立场，仅供参考！