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 Hepaidforaseat,whenhe______haveenteredfree.A.could  B....

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问题详情:

 Hepaidforaseat,whenhe______haveenteredfree.A.could  B....

 He paid for a seat, when he ______ have entered free.

A. could   B. would    C. must    D. need

【回答】

A

知识点:虚拟语气与情态动词

题型:选择题

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