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外语
He ______ have been nervous because he didn’t go straight in.
He ______ have been nervous because he didn’t go straight in.
admin
2014-03-10
32
问题
He ______ have been nervous because he didn’t go straight in.
选项
A、ought to
B、must
C、should
D、had to
答案
B
解析
考查情态动词的用法。“must+完成时(或完成进行时)”是对过去事实一种较为确定的推测.表示过去某时刻必定发生的事。ought to/should+have done表示“本应该做某事却没有做”,与句意不符。had to“不得不”,不符合题意。因此B为正确选项。
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0
专业英语四级
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