The emergency required that all the tasks _____ at least two days ahead of time. A.to complete B.should complete C.be completed Dshould have been completed
C |
考查虚拟语气。句意:紧急需要要求所有任务必须最少提前两天完成。“should+have+done”意思是“本来应该做某事,而实际没做。Task是被完成的对象,故用被动语态,选C。 |
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