--Must I finish my homework now?
--No, you _______ You can do it tomorrow.
A. can't                       B. needn't             C. mustn't
B

試題分析：試題分析：must的含義是必須一定，其否定形式mustn’t表示禁止的含義。故must的否定回答一般借助于needn’和don’t have to來構成，句意:我現(xiàn)在必須完成我的作業(yè)嗎?根據(jù)前文no，可知下文為否定回答，故選B。
點評：must的否定形式是�？純�(nèi)容之一，結(jié)構比較固定，熟記即可。
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