题目内容
1．-Let's go to the concert tonight，Michael!-Sorry，I _________．I have to help my mother with the housework．（ ）
| A． | mustn't | B． | may not | C． | can't |
分析 --Michael，让我们今天晚上去听音乐会吧？
--抱歉，我不能．我必须在家帮妈妈做家务．
解答 答案：C．
结合选项可知本题考查情态动词，首先明确选项中每个单词的意思：A：不可以（表禁止）； C：不能； 根据设空处后面的I have to help my mother with the housework，结合题干推测句意是"抱歉，我不能．我必须在家帮妈妈做家务．"，所以can't 符合句意，故选C．
点评 本题考查了情态动词的用法．解答时首先根据题干明确句意，理解所给选项中每个情态动词的意思并熟练掌握它们的用法，便可作出正确选择．
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