【題目】—______ we clean our rooms first?
—No, you ______. You can do your homework first.
A.Must, mustn't
B.Must , needn't
C.Can, needn't

【答案】B
【解析】句意:—我們必須先打掃房間嗎?—不,不必。你可以先做你的家庭作業(yè)。考查情態(tài)動(dòng)詞辨析題。can能,表示請(qǐng)求許可;need需要,相當(dāng)于want;must必須/一定,它的一般疑問(wèn)句如是否定回答,需用need+not,表示不必的意思。根據(jù)句意和語(yǔ)境,可知選B。

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