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外语
It is imperative that the students ______ to hand in their papers on time.
It is imperative that the students ______ to hand in their papers on time.
admin
2013-02-05
59
问题
It is imperative that the students ______ to hand in their papers on time.
选项
A、told
B、be told
C、are told
D、have been told
答案
B
解析
在It is imperative that...的句型中,从句里只能使用虚拟语气的情态动词should,也可以省略 should。之所以选B,是因为省略了should。选项A不能用,是因为tell是及物动词,后面没有宾语,又不能加动词不定式做宾语。
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专业英语四级
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