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【题目】__________ to smart phones just before bed, as a research says recently, can lead to poor night’s sleep.

A. Being exposedB. ExposedC. Having exposedD. To expose

【答案】A

【解析】

试题分析:考查非谓语动词。句意:据最近的一次调查报道,睡前暴露在智能手机会导致晚上睡不好。人是被暴露在手机辐射下的,应用被动语态。因为在句中作主语,应用动名词。故选A项。

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