Hello, everyone! We're studying in the school. It's our duty to keep our environment clean and tidy.

When it's bad, we'll be sick. When people cut a lot of trees, it's destroyed. Many birds will have no home

to go. They'll die. To protect it, we shouldn't spit in public places. We should neither draw anything on

the walls nor throw any litter onto the ground. I think we must make it a rule to do some cleaning every

day. If everyone tries his best to do something useful for our school, I'm sure our school will be more

beautiful. That's all.

                                                                                                                                     Thank you

(答案不唯一)