One day a little girl came home from school， and said to her mother， Mommy， today in school I was punished for something that I didn't do.

The mother exclaimed， But that's terrible! I'm going to have a talk with your teacher about this! By the way， what was it that you didn't do?

The little girl replied， My homework.

一天，小女孩从学校回到家里，对妈妈说：妈妈，今天在学校里我因为一件我没有做的事情而受到惩罚。

妈妈激动地说：那真是太可怕了！我要跟你的老师好好谈一谈，对了，你没有做过的那件事是什么？

小女孩回答说：我的家庭作业。