河南成教 / 大学英语
正确率：100%
5[单选题]
By the time Jack comes back from his hometown, we _ _ _ _ _ _ _ all the preparations.
A.finish
B.have finished
C.had finished
D.shall have finished
By the time Jack comes back from his hometown, we _ _ _ _ _ _ _ all the preparations.
参考答案：
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