题干
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
答案(点此获取答案解析）
D
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
则下列结论中不正确的是（ ）