题目内容

They demanded that the library _____ open to students during the vacation.
A.should keepB.was keptC.would be keptD.be kept
D
考查虚拟语气:主句的动词是demand,从句的谓语用(should) do表示虚拟语气,the library和keep是被动关系,用be kept,句意:他们要求假期图书馆向学生开放,选D。
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