摘要：12．[2010·北京西城二模]The girls a game called Bomb happily when the teacher suddenly entered the classroom. A．played B．were playing C．are playing D．had played 12B考查动词时态.句意:当老师突然进入教室的时候.女孩子们正在高兴地玩一种叫Bomb的游戏.根据句意用过去进行时.

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