题目内容
【题目】【2013浙江杭州】Sally took a photo of her friends while they _________ computer games.
A. play B. are playing
C. have played D. were playing
【答案】D
【解析】
试题分析:根据句意“塞丽为朋友照相”和下文句意“当他们玩电脑游戏时”可知,两个动作同时发生,while后常接进行时。故选D。
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