They___ the film at that time a.may see b.mustn't see c.must have been d.can have seenThey___ the film at that time a.may see b.mustn't see c.must have been d.can have seen

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They___ the film at that time a.may see b.mustn't see c.must have been d.can have seenThey___ 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
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 seenThey___ the film at that time a.may see b.mustn't see c.must have been d.can have seen
C
must have done 一定已经,对发生过的事作以肯定推测

d.can have seen

选择C。 本题用排除法，ABD时态错误。
意味：在那时，他们一定已经看了那部电影。

must have seen

选项C的答案你是不是打错了，应该是must have seen 吧。如果是这样，这道题答案选C。你可以从at that time（在那时）这个时间状语来判断，考的是情态动词must对过去的推测的用法，基本结构是must have done. 如果你答案没打错，这道题就没有正确答案了。

答案选C句意是：他们绝对是那次看的电影
首先B选项绝对不正确，它表示的意思是绝对禁止的意思，据题意可知：他们是已经看了电影的，既然是他们看过了，那么D选项中的can就因该是could，那么相继的A选项就不正确了，已经看了且完场这个动作，要用情态动词的完成时态。...

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答案选C句意是：他们绝对是那次看的电影
首先B选项绝对不正确，它表示的意思是绝对禁止的意思，据题意可知：他们是已经看了电影的，既然是他们看过了，那么D选项中的can就因该是could，那么相继的A选项就不正确了，已经看了且完场这个动作，要用情态动词的完成时态。

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he wondered if they___( see )the film if they could get the tickets.怎么填 They___ the film at that time a.may see b.mustn't see c.must have been d.can have seenThey___ the film at that time a.may see b.mustn't see c.must have been d.can have seen when the teacher came in,they___(break off)their talk at once.用适当形式填空 They___(上演）a short play at the party tomorrow evening. They had fun at the party last sunday的同义句They___ ____ ___ ____ at the party last sunday The film begins at half past seven. We watch the film at midnight对“at midnight提问 The film Gone with the Wind is ( ) at the cinema at the cinema 同上the film is on at the cinema.at the cinema的同上 I will see the film at the cinema是什么意思 The film s___ at 7:00 in the evening. The film starts at 8:00.(否定句)The film ____ ____at8:30 Look!They___(swim)in the river They___(not water)the flowers last Tuesday The film starts at half past eight.改成一般疑问句 Did you see a film at the _______ yesterday evening? At this point is the film ready for distribution? How long will the film last_____(at/for)?