VIII. Write: 1. They will show the time machine to the public when they finish it. The time machine........... 2. Keeping the environment clean is very important. It’s ............... 3. To see this film is very boring. It’s ........... 4. To understand these lessons is not easy. It’s............ 5. People recycle old car tires to make shoes and sandals. Old car tires ...... 6. People cut the bottles into small pieces. The bottles.......... 7. People mix the small pieces with certain chemicals. The small pieces ....... 8. People heat the mixture into pasty liquid. The mixture............... 9. People blow the liquid into new bottles. The liquid............ 10. People recycle used plastic things to save natural resources. Used ............ 11. We are going to clean the environment. We are ready. We are .......... 12. Keeping people from littering is very difficult. It is ...... 13. She must empty he kitchen garbage. She is not pleased. She is ... 14. Being able to live in a clean environment is lucky. It is ..... 15. They hear about the plan to collect the used boxes. They are surprised. They are ........