问题描述：
语法题目请解释分析A,D里选哪个谢谢
By he time i returned ,u ( )this book.
A.would have finished
B.would finish
C.will be finished
D.should have finished
By he time i returned ,u ( )this book.
A.would have finished
B.would finish
C.will be finished
D.should have finished
问题解答：
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