______ tablet computers like Apple’s iPad just before bed, a researcher says recently, can lead to a poor night’s sleep.

A. Using B. Used C. To use D. Use

A

【解析】

試題分析：研究人員指出，在上床睡覺之前用筆記本電腦如蘋果的平板電腦會(huì)導(dǎo)致晚上睡眠不好。分析句子結(jié)構(gòu)可知______ tablet computers like Apple’s iPad just before bed在句中充當(dāng)主語，故用動(dòng)名詞作主語，故選A。

考點(diǎn)：考查動(dòng)名詞作主語

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