You ________ be tired-you've only been working for an hour.

问题描述:

You ________ be tired-you've only been working for an hour.
A.must not B.won't C.can't D.may not

答案C 句中破折号后的内容对前一句进行解释说明:你只工作了一个小时,所以你不可能累的.表示否定推测时用can’t.查看原帖>>