The room must have been cleaned by Tom yesterday,________ it?
A.mustn't B.hasn't C.didn't D.wasn't
选D
人气：478 ℃ 时间：2019-09-22 09:38:59
解答
The room must have been cleaned by Tom yesterday,________ it?A.mustn't B.hasn't C.didn't D.wasn't选D这边是【must have been done】的结构,表示的是一种对过去的推测所以反义疑问句不用mustn't it 而用【wasn'...
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