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______ tablet computers like Apple’s iPad just before bed, a researcher says recently, can lead to a poor night’s sleep.
A.UsingB.UsedC.To useD.Use
答案:A
试题分析:研究人员指出,在上床睡觉之前用笔记本电脑如苹果的平板电脑会导致晚上睡眠不好。分析句子结构可知______ tablet computers like Apple’s iPad just before bed在句中充当主语,故用动名词作主语,故选A。
考点:考查动名词作主语