Question

【题目】－What were you doing at 4:00pm yesterday afternoon?

－I __________ the classroom.

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

Answer 1

【答案】C

【解析】

句意：——昨天下午4点你正在做什么？——我正在打扫教室。根据What were you doing at 4:00pm yesterday afternoon?可知此处用过去进行时，故选C。