问题补充:
—When did you come back?
—An hour ago. Youthe computer games.
A. have played
B. were playing
C. played
D. had played
答案:
A. have played
(答案→)B. were playing
C. played
D. had played
解析:考察时态。句意:你什么时候回来的?——一小时前。你正在玩电脑游戏的时候。可知下文描述的是在过去某个时间正在进行的动作,故用过去进行时态,选B.