long long ago, a mouse mother and her kids live beside a beautiful river. they are singing , dancing and playing games together everyday. their life is very happy. one day, a big yellow cat entered into their house and going to eat little mice. At that dangerous time, the mouse mother cried as a dog wisely, "woh,woh" .the cat is scared and run away immediately. the mouse babies are saved. the mother said to her kids removedly, "now u all know, how's important to learn one foreign language."