before bed, cellphones can result in a restless night.A. To use B. Using C. Used D. Having used 题目和参考答案——青夏教育精英家教网——

题目内容

______ before bed, cellphones can result in a restless night.

A. To use B. Using C. Used D. Having used

C

【解析】

试题分析：考查非谓语动词。句意：睡前使用手机，会导致睡眠质量下降。Cellphones与use是动宾关系，即使用手机，应该用过去分词表被动，排除A、B、D，本句可改写为：If cellphones are used before bed, they can result in a restless night.，故选C。

考点：考查非谓语动词

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