【題目】— Mom, must I finish my homework now?
— No, you ________. You may have supper first.
A.mustn't
B.needn't
C.can't
D.couldn't

【答案】B
【解析】句意：——媽媽，我現(xiàn)在必須完成作業(yè)嗎？——不，你不必，你可以先吃完飯。對must引導(dǎo)的一般疑問句，否定回答時常用needn't。故選B。

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