Question

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

— I ______ the classroom.

A.was cleaningB.have cleaned

C.will cleanD.clean

Answer 1

【答案】A

【解析】

试题句意：昨天下午当我们正在打篮球时，你正在做什么？结合语境可知下文描述的是过去某时正在进行的动作，故用过去进行时态。选A。