【題目】—Must I be home before eight o'clockmum?

—No,you ____.But you have to come back before ten o'clock.

A. needn'tB. can't

C. mustn't

【答案】A

【解析】

句意:——媽媽。8點(diǎn)前我必須在家嗎?——不,你不需要。但是10點(diǎn)前你必須回來(lái)。

根據(jù)句意可知是不需要;must引導(dǎo)的一般疑問句,表示必須時(shí),否定回答用needn’t,表示不需要;needn't不需要,can't不能,不可能(表示推測(cè)),mustn't必須不,表示禁止;故選A

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