1. The time machine will be shown to the public when they finish it.
2. It's very important to keep the environment be cleaned.
3. It's boring to see this film.
4. It's not easy to understand these lessons.
5. Old car tires are recycled to make shoes and sandals.
6. The bottles are cut into small pieces.
7. The small pieces are mixed with certain chemicals.
8. The mixture is heated into pasty liquid.
9. The liquid is blown into new bottles.
10. Used plastic things are recycled to save natural resources.
11. We are ready to clean the environment. (?)
12. It is difficult to keep people from littering.
13. She is not pleased to empty the kitchen garbage.
14. It is lucky to be able to live in a clean environment
15. They are surprised to hear about the plan to collect the used boxes.
- Chúc bạn học tốt !!!!!!!!