As for__the teachers' questions,he is very___in class

问题描述:

As for__the teachers' questions,he is very___in class
A.answering activeB.answeringactively C.ot anweractivity D.answeractivities

明显是A嘛,as for 后面不能接一般动词,后面一空明显是填形容词,所以只有A了~