.The bridge being built there by the time you come back.A. has been completedB. will have

问题补充：

.

The bridge being built there by the time you come back.

A. has been completed

B. will have been completed

C. will complete

D. has completed

答案：

A. has been completed

(答案→)B. will have been completed

C. will complete

D. has completed

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