题目内容
14．-Must I clean the classroom right now，Miss Lin？-No，you ________．You may do it after school．（ ）
| A． | needn't | B． | can't | C． | shouldn't |
分析 --林老师，我现在必须打扫教室吗？
--不，你不必．你可以放学以后打扫．
解答 答案：A．
根据No和You may do it after school．可知下面为否定回答，must的含义是必须一定，其否定形式mustn't表示禁止的含义．在这里不是禁止的意思．must的否定回答一般可借助于needn'和don't have to来构成表不必．故选A．
点评 本题考查了情态动词的用法．注意must的用法以及它的肯否定形式．
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