It is imperative that students_____

单选题 It is imperative that students______ their term papers on time.

A． hand in
B． would hand in
C． have to hand in
D． handed in

【答案】A。解析：句型It is imperative that…+V(动词原形)…表示“……是必须的”，句意为学生必须按时上交他们的学期论文。因此正确答案为A。

1 Michael is very good at each subject, and it is______ that he will be admitted by the university in which he has been longing to study.

A． no problem
B． no doubt
C． out of the question
D． out of question

2 It is necessary that the plan______before Thursday.

A． were fulfilled
B． was fulfilled
C． be fulfilled
D． would be fulfilled

3 You______ all those calculations!We have a computer to do that sort of thing.

A． needn't have done
B． must not have done
C． shouldn't have done
D． could not have done