Reason of Punishment

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 exclaimed¹, "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." 

惩罚的原因

　　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。”