It is now 5 o’clock; _____ their work by 7:00 p.m.

来源：百度知道编辑：UC知道时间：2024/05/16 02:10:28

A .they will finish
B .they are finishing
C .they have finished
D .they will have finished

It is now 5 o’clock; _____ their work by 7:00 p.m.

选择：D.they will have finished
翻译：现在5点了，他们必须在晚上7点完成工作。
解释：“they will have finished”--将来完成时，具有猜测、预计、希望的意思。

D
将来时有by, 将来完成时，到七点，他们将会完成他们的工作。

D,后面的介词by暗示应该选完成时

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