I don’t believe him. He______be serious.

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问题 I don’t believe him. He______be serious.

选项 A、needn’t
B、can’t
C、may not
D、mustn’t

答案B

解析表示对现在发生的事情的否定推测，即“一定不会……”用can’t或couldn’t。

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英语

成考专升本

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