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【题目】Extreme sports such as rock climbing can be very dangerous, so we________ be too careful.

A.can’tB.mustn’tC.shouldn’tD.needn’t

【答案】A

【解析】

句意:攀岩等极限运动非常危险,所以我们再小心也不为过。

考查情态动词。“can't be too+形容词” 表示“再……也不为过/不过分”;故选A

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