Mary all the exercises before her teacher collected the exercise books. A.have finished B.finished C.had finished D.finish 答案:C Mary完成作业.发生在老师手作业之前.“过去的过去 用过去完成时. 查看更多

 

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Mary    all the exercises before her teacher collected the exercise books.?

A.have finished       B.finished       

C.had finished     D.finish?

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