By the time I return, you ______ this book. [originaltext]本题考查的是将来完成时的用法。将来完成时常和

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问题 By the time I return, you ______ this book.

本题考查的是将来完成时的用法。将来完成时常和by或by the time等结构连用，表示在将来某一时间以前已经完成或一直持续的动作。故选项B为正确答案。

选项 A、would finish
B、should have finished
C、would have finished
D、will be finished

答案 B

解析

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