It must be John who is in the office.I'm sure it()be John.Isaw him off at the railway station just
twenty minutes ago.
A.won't B.mustn't C.can't D.needn't
选哪个?为什么?
人气：459 ℃ 时间：2020-04-30 08:07:21
解答
选C 这里表示肯定的回答 后面说道了 I'm sure it 而且为了进一步证明 有说到Isaw him off at the railway station just twenty minutes ago.(20分钟前在火车站我看见他离开的)表示肯定的回答 用 can 他的否定形式 是...
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