【題目】When having a fire drill, we _____run downstairs.

A.needn’tB.mustn’tC.can’tD.may not

【答案】A

【解析】

句意:進(jìn)行消防演習(xí)時(shí),我們不必跑下樓。

考查情態(tài)動(dòng)詞。A. needn’t不必;B. mustn’t不準(zhǔn)、禁止;C. can’t不可能;D. may not也許不是。根據(jù)句意,進(jìn)行消防演習(xí)時(shí),我們不必跑下樓,CD選項(xiàng)表推測,不符合句意,可排除。B選項(xiàng)語氣強(qiáng)硬,是“禁止做某事”的意思,與句意不符,故應(yīng)選A。

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