I had not been reading for half an hour _____ I heard the steps outside._刷题宝

题干

I had not been reading for half an hour _____ I heard the steps outside.

A：whe

B：while

C：a

D：since

上一题下一题 0.0难度选择题更新时间:2016-02-25 06:37:33

答案(点此获取答案解析）

A

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