​5: (Tạm dịch đề bài: vấn đề môi trường ở Việt Nam và con ng nên làm gì để bảo vệ nó)
- Start from the air:
+ As you know, when the factories work they will waste smoke to the air. Not only the factories but also we make the air become dirty, but we don’t know about this.
+ Everyday we use motorbike or car to go to work. These means waste smoke to the air, too. It pollutes the air.
- Secondly, we talk about the land:
+ Somebody uses plastic bags, bottles or cans and throw them anywhere, they will cause pollution because they are very hard to dissolve.
+ People cut down the trees and sell them for money, the soil will be damaged. I think with this work, someday in the future we’ll be seen the green of the trees.
- The final matter is water pollution:
+ While the factories waste toxic into the water and could not make it worse.
+ People living by catch the animals live in water by electronic shock. 
- To protect the environment we should reduce the plastic bags, bottles and cans. Remember save paper, we can save the trees in forest, that mean we can reduce the land pollution. It would be better if you go to work or school by bike or walk, we cdan save energy and keep the air cleaner. Or you can reuse and recycle things, don’t burn trash and we should plant trees. This is the best way to reduce the air pollution. And I think we should not throw trash into the water, don’t catch the animals by electronic shock, the factories should not waste toxic or smoke to the natural. Do these things we will protect the environment, we will protect our life.