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He ________ have been nervous because he didn’t go straight in.A、ought toB、must
He ________ have been nervous because he didn’t go straight in.A、ought toB、must
游客
2023-11-22
9
管理
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
“must+完成时(或完成进行时)”可用来表示对过去的事实一种较为确定的推测,表示过去某时刻必定发生的事。而ought to,should和had to分别含有应该和不得不的语气,不符合题意。因此B为正确选项。
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