I think teachers should [ ]carefully in class.I agree,Or student can't get good grades

问题描述:

I think teachers should [ ]carefully in class.I agree,Or student can't get good grades
A.listen B.be listened to C.be listen toD.be listened

b
我认为上课应当认真听老师的 我同意 否则学生不会取得好成绩
这里 老师作主语 所以 老师是被学生听的 要用被动语态
listen to 是短语