What were you doing ________ your mother was cooking supper?_刷题宝

题干

What were you doing ________ your mother was cooking supper?

A：where

B：what

C：how

D：while

上一题下一题 0.0难度选择题更新时间:2016-03-08 04:51:07

答案(点此获取答案解析）

D

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