您当前位置：
Son:
I'm home ,Mummy. 
妈，我回来了。
Mother:
Welcome to come back,dear.But why do you get home so late?
欢迎回来，宝贝儿。可你为什么回来得这么晚？
Son:
The teacher did not stop teaching until the headmaster came in .
老师拖课了。
Mother:
Oh, I see.
原来如此。