参考范文：
My classmates and I had a tour this spring. We had a good time. But meanwhile I knew that environmental pollution in our country was becoming more and more serious.
On our way, we could see women washing clothes in the river. Litter was floating on the river. Waste water produced by a chemical factory was being discharged into the river. We did not see any fish in the river. The river was not so clear as before. Water quality was very bad. I am worried about it because water is important to all living things. Man can not live without water.
I hope people pay more attention to this problem, especially the government. Try to control the pollution of water as early as possible. At last I would like to say, "To protect environment is to protect life."
参考译文：
今年春天我和我的同学参观。我们有一个美好的时光。但同时我知道在我们国家,环境污染越来越严重。
在我们的方式,我们可以看到妇女在河里洗衣服。垃圾漂浮在河上。化学工厂产生的废水被排入河里。我们没有看到任何在河里的鱼。这条河并不是那么明确。水质很差。我担心它,因为水对所有生物都很重要。人没有水是无法生存。
我希望人们更多关注这个问题,特别是政府。试着尽可能早地控制水的污染。最后我想说:“保护环境就是保护生命。”