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【题目】________ basic first-aid techniques will help you respond quickly to emergencies.

A. Known B. Having known

C. Knowing D. Being known

【答案】C

【解析】

试题分析:考查非谓语动词的用法。动名词在本句中作主语,此处表示一般情况,用一般式;having known 是完成式,表示动作已经完成或先于谓语动词发生。句意为:懂得一些基本的急救技巧将有助于你对紧急情况作出快速应对。

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