来源：学生作业帮助网 编辑：作业帮 时间：2023/03/21 15:37:55
The earth is crying.So we mustn't pollute（污染）the enronment. We should protect it. We mustn't leave rubbish everywhere. We mustn't smoke in public places（在公共场所）.We mustn't walk on the grass.
I am a student/pupil. Let us protect the enronment together. I think the earth will become more beautiful. The earth will be happy.