Question

【题目】—________ are the students doing?
—They are playing football.
A.Who
B.What
C.Whose

Answer 1

【答案】B
【解析】句意：—学生们正在干什么？—他们正在踢足球。A.谁；B.什么；C. 谁的，根据答语中的playing football得知，询问在干什么，故选B。