一天你放学回家时，你的父母没有在家。然后，你便玩起了电脑游戏，当你正玩得高兴时，你的父母回家了。以下列问题为线索。写一篇60词左右的短文。要求符合逻辑，情节合理。

提示：（1）When did you get home?

(2) What did you do first when you got home?

(3)What were you doing when your parents got home?

(4)What did your parents say to you?

下列命题是真命题的是（　　）

A．相等的弦所对的弧相等

B．圆心角相等，其所对的弦相等

C．在同圆或等圆中，圆心角不等，所对的弦不相等

D．弦相等，它所对的圆心角相等