修改后：
　When I was a kid, the river was very clear and beautiful, so I always went swimming and fishing. Recently, I discover that there is more and more garbage around the river. Garbage doesn’t reduce even though some people are not willing to throw that into the trash. It not only affects human health but also destroys our beautiful environment.

　My teacher told me that if people still did not protect the environment, we would be in trouble. For example, you eat a gum, but you throw it on the road. Some animals will die because of the gum. If some animals die, it will cause some infectious disease. Nevertheless, there are still more and more bottles on the beach. Some people don’t know how to protect the environment, it may make water become poisonous. Nowadays, researchers has discovered that human will get cancer owing to the water.

　What’s worse, some factories still break the law to pollute the river in order to get more money. They don’t know how important the water is. We use it everywhere, and we should treasure it. Therefore, we need to try our best to protect the environment because there is only one earth in the world. We have to remember where the happiness comes from and also learn how to protect everything where we live forever.

修改老师：Crystal 老师 

　　三年级:黃欣欣

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