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外语
— The door was open. — It______open. I had locked it myself and the key was in my pocket.
— The door was open. — It______open. I had locked it myself and the key was in my pocket.
admin
2011-04-07
46
问题
— The door was open. — It______open. I had locked it myself and the key was in my pocket.
选项
A、can’t be
B、mustn’t be
C、can’t have been
D、mustn’t have been
答案
C
解析
该题是语法结构题,考查情态动词的用法。该题需要一个表示对过去所发生的事情进行否定猜测的语法结构。选项A表示对现在所发生的动作或存在的状况进行否定猜测。选项B和选项D中的mustn’t表示禁止做某事。如果要用must来表示猜测,一般用肯定形式must be或must have done sth.等。(有时也可用mustn’t have done sth.表示对过去事情的否定猜测,意思是“肯定没有……”,语气没有选项C“不可能……”强,在本题中不是最佳答案。)选项C也表示对过去事情的否定猜测。因此,根据题意和语法规则,选项C为最佳答案。
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0
专业英语四级
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