Must I wait till you come back?  No, you ______.
A．mustn'tB．needn't
C．can'tD．won't
B

試題分析:句意：---我必須等到你回來嗎？--不，不必。Must“必須”，在疑問句中的肯定回答是：Yes ,you must .否定句中的回答是：No，you needn’t ,或者是 No，you don’t have to。選B。
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