They___ the film at that time a.may see b.mustn't see c.must have been d.can have seen
They___ the film at that time a.may see b.mustn't see c.must have been d.can have seen
人气：189 ℃ 时间：2019-08-19 20:35:27
解答
C
must have done 一定已经,对发生过的事作以肯定推测
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