An old woman has a cat. The cat is now very old. She can not run fast, and she can not bite. One day the old cat sees a mouse. she jumps and catches the mouse. But she cannot bite it. So the mouse gets out of her mouth and runs away.Then the old woman is very angry because the cat cannot kill the mouse. She begins to beat the cat. The cat says to her, "Don't beat me. Be friendly to me. When I was young, I did good work for you."