It is imperative that students ______ their term papers on time.[2004]

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问题 It is imperative that students ______ their term papers on time.[2004]

选项 A、hand in
B、would hand in
C、have to hand in
D、handed in

答案A

解析在it is。imperative／necessary／important+that．．．结构中，从句应该使用虚拟语气"should+动词原形”，should可以省略，因此本题应该选择A。

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专业英语四级

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