Question

【题目】While you , what was your mother doing?

A.are walkingB.walkC.walkedD.were walking

Answer 1

【答案】D

【解析】

句意：当你在走路的时候，你妈妈在干什么？

考查时态。A. are walking走路，现在进行时；B. walk走路，一般现在时；C. walked走路，一般过去时；D. were walking走路，过去进行时。根据主句what was your mother doing用了过去进行时，可知while引导的从句也要用过去进行时表示对比，故选D。