题目内容
3．-Must I hand in my homework now，Mr．Smith？-No，you ________．（ ）
| A． | can't | B． | shouldn't | C． | wouldn't | D． | needn't |
分析 --我现在必须交上我的作业吗，Smith先生？
--不，你不必．
解答 答案：D．
根据No．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D．
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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