问题
选择题
Sally took a photo of her friends while they ______ computer games.
A．played
B．were playing
C．had played
D．play
答案
答案：B
题目分析: 句意：当她的朋友们玩电子游戏时，她给他们拍了一张相片。while当……的时候，引导的时间状语从句用进行时态，故选B.
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