2．-Must I finish my homework before class is over？
-No，you ______．You can hand it in tomorrow．（　　）
A．mustn'tB．shouldn'tC．can'tD．needn't

分析 --我必須在下課以前完成作業(yè)嗎？
--不，不必．你可以明天交．

解答 答案：D．回答must的問句，肯定用yes，you must，否定用no，you needn't或you don't have to．所以答案是D．

點評 考查情態(tài)動詞．由must引出的一般疑問句，肯定回答用must，否定回答用needn't，don't need to或don't have to均可，但不用mustn't，因為mustn't表示"不許、禁止"的意思，與問句的原意不符．如：
-Must I stay at home？我必須留在家里嗎？
-Yes，you must．是的，你必須留在家里．
（No，you needn't．或No，you don't have to．）（不，不用了．）
如果是反意疑問句，疑問部分一般不用needn't，而用mustn't；否定回答時仍用needn't，don't need to或don't have to．如：
-You must go on foot，mustn't you？你必須走著去，是嗎？
-Yes，I must．是的，是這樣．
（No，I needn't．或No，I don't have to．） （不，不是的．）

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