―Tom is never late for work. Why is be absent today?―Something to him. A．must happen B．should have happened C．could have happened D．must have happened 题目和参考答案——青夏教育精英家教网—

题目内容

―Tom is never late for work. Why is be absent today?

―Something ________ to him.

A．must happen B．should have happened

C．could have happened D．must have happened

解析： 此题考查了情态动词的用法。“must＋have＋过去分词”表示对过去发生事情的一种较为肯定的推测，而“should＋have＋过去分词”表示应该做到而实际上没有做到的事情。

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