英语翻译当我到家时你在哪?当我在北京时我看见他三次当我吃饭时电话铃响了当我写信时我妹妹正在跳舞

When I reached home,where were you?
I saw him thrice when I was in Beijing.
The phone rang when I was having a meal.
My younger sister was dancing while I was writing a letter.