Question

【题目】—What were you doing when we were playing basketball yesterday afternoon?

— I _______the classroom.

A. clean B. have cleaned C. will clean D. was cleaning

Answer 1

【答案】D

【解析】句意：——昨天下午我们打篮球时你在干什么？——我在打扫教室。问句是过去进行时态，询问正在做什么，故答语也应该用过去进行时态，答案为D。