作业精灵老师示例：
Lion：I'm large and strong.
Animals：Look，the lion is coming.Let's run.
Lion：What are you doing here，Little Mouse？I'm going to eat you.
Mouse：Please don't eat me.I can help you some day.
Lion：Ha！Ha！You are so small and weak.How can you help me？
Mouse：Please believe me.I'm clever.I can help you.
Lion：OK.You can go.
Lion：Help！Who can help me？
Mouse：Don't worry.Let me make a hole in the net with my teeth.
Lion：Thank you，Little Mouse.
