作业帮27) The construction of the laboratory ____by the end of next month.A) must be completed B) must have been completedC) will be completing D) will have been completing
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27) The construction of the laboratory ____by the end of next month.A) must be completed B) must have been completedC) will be completing D) will have been completing
27) The construction of the laboratory ____by the end of next month.
A) must be completed
B) must have been completed
C) will be completing
D) will have been completing
27) The construction of the laboratory ____by the end of next month.A) must be completed B) must have been completedC) will be completing D) will have been completing
The construction of the laboratory _B___by the end of next month.
A) must be completed
B) must have been completed
C) will be completing
D) will have been completing
----"by end of +将来时间",动词用“将来完成时”,又由于The construction of the laboratory（实验室的建设）不会自己完成,应用被动语态,所以排除D,只能选完成时被动语态的B.
因为是next month所以排除b
cd选项没有被动含义，排除
故选a
B 那个时候肯定已经建好了
选B
很明显！选B 将来完成时 又是被动语态。因为完成的东西是在说话的将来，并且是完成状态！故 因选者B！