Now there are many students going to study amateur,some people think that this is waste of time.
A few people regard some students' learning of presence in amateur school as a waste of time
Nowadays some students go to amateur school and study, but someone think they are wasting their time.
Nowadays some students go to amateur school ,which some people suppose is a waste of time
答：应是C A、B、D 均是专业人员，只有C可代表市民全体。详情>>
答：详情>>
