题目内容
2．-That must be Mr．John．-No，it ________ be him．I saw him off at the airport half an hour ago．（ ）
| A． | may not | B． | mustn't | C． | can't | D． | needn't |
分析 句意：--那一定是约翰先生．
--不，那不可能是他．半个小时前我在飞机场看到他离开了．
解答 答案：C．may not可能不；mustn't，不可以；can't，不可能；needn't不必．根据I saw him off at the airport half an hour ago，可知半个小时前我在飞机场看到他离开了，不可能是他．can't，不可能．故选C．
点评 本题考查了情态动词的用法．中考的必考内容，解答时注意区分和辨别句意以及所给选项的意思．
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