I have no idea what _____ while I was asleep.A．has happenedB．could happenC．had_刷题宝

题干

I have no idea what _____ while I was asleep.

A．has happened

B．could happen

C．had happened

D．happened

上一题下一题 0.65难度单项选择更新时间:2013-12-02 02:45:23

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