拥有一个干净、优美的学习环境非常重要，我们应该保持校园环境的清洁。请以How to Make Our School Clean and Beautiful为题，写一篇议论文。

要求：1. 语言流畅、连贯，表达清晰，语法正确；

      2. 字数80--100词以上。

1、How to Make Our School Clean and Beautiful

Our school is like our home. The number of the students in our school is very large（about two thousand）. And we study here five days here a week. It’s our duty to keep our school clean and beautiful all the time. But how can we do that? I think we should plant more trees and flowers in it. We shouldn’t spit in public place, such as the library and the classrooms. We should neither draw pictures on the wall nor throw any rubbish here and there. If everyone tries his best to protect our school environment, I’m sure our school will be more beautiful.