Question

【题目】He _______ computer games when his parents left home. So he didn't know where they were.
A.is playing
B.plays
C.played
D.was playing

Answer 1

【答案】D
【解析】句意：他的父母离开家时他在玩电脑游戏。所以他不知道他们在哪里。根据语境可知该用过去进行时，所以选D。