题目内容
10．-Excuse me，is Jim in the classroom now？-He _____ be in the classroom because I saw him go to the post office just now．（ ）
| A． | must | B． | mustn't | C． | can't | D． | needn't |
分析 --打扰一下，Jim现在在教室里吗？
--他不可能在教室里因为刚刚我看见他去邮局了．
解答 答案：C．must一定，必须；mustn't不可以；can't不可能；needn't不必．根据I saw him go to the post office just now，可知刚刚我看见他去邮局了，所以Jim不可能在教室里．can't不可能．故选C．
点评 本题考查了情态动词的用法．解答时注意理解句意以及所给选项的意思并作出正确回答．
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