五、Billy和Eliza是同班同学，他们在学校里发生了哪些趣事呢？阅读短文，完成下面的思维导图。
　　The students are in the classroom. Billy throws(扔) a book. It hits the window. The teacher is angry(生气的)，“Who throws the book?” “It is Eliza!” says Billy. Now Eliza is angry，“It isn't me. Billy，it is you!” “You shouldn't throw things，” says the teacher. Billy is sad and very sorry. He comes back to class. At lunchtime，Billy is busy. But Eliza is still angry and sad. She tips(倒出) Billy's bag on the grass. “What's the matter? Who does that?” asks the teacher. “It is me，” says Billy. Now Eliza feels bad. The next day，Eliza helps Billy do lots of work. They are both happy. It's good to be friends again.
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1. book 2. window 3. sad 4. bag 5. grass 6. Billy 7. grass 8. happy 9. good 10. friends