The room must have been cleaned by Tom yesterday,________ it?A.mustn't B.hasn't C.didn't D.wasn't选D
问题描述：
The room must have been cleaned by Tom yesterday,________ it?
A.mustn't B.hasn't C.didn't D.wasn't
选D
答
D 前面的句中用must表示猜测，而在反义疑问句中要根据实际情况。
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'...