2. 外语
  3. It is imperative that students______their term papers on time.

It is imperative that students______their term papers on time.

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问题 It is imperative that students______their term papers on time.
选项 A、have to hand in
B、handed in
C、hand in
D、would hand in
答案C
解析 本题考查的是虚拟语气。句子的意思是：学生必须按时上交他们的学期论文。It is imperative/necessary/important等结构后的主语从句中，谓语动词可用虚拟语气should十动词原形，should可省略，所以正确答案为C。
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