A mother and son were washing dishes while the father and daughter were watching TV in the room. Suddenly, there was a crash of breaking dishes, then complete silence.

　　妈妈和儿子在洗盘子，爸爸和女儿则在房间里看电视。突然，响起了盘子打碎的声音，然后是一片沉寂。

　　The girl looked at her father and said, “It was Mom”。

　　女儿对爸爸说：“是妈妈。”

　　"How do you know?” asked her father.

　　“你怎么知道的?”爸爸问。

　　"She didn"t say anything.”

　　“她什么都没说。”