10. They will fix our roof tomorrow.
11. Flying cars will be shown to the public when they finish it.
12. Solar panels will be installed on the roof of our house next week.
13. Biogas will be being used for cooking and heating at this time next month.
14. Fossil fuels won't be burnt for energy in the future.
15. Tokyo has fewer billionaires than New York.
16. Did a group of foreingers visit the slum last week?
17. The countryside doesn't suffer less pollution than the city.
18. Overpopulation causes a lot of social problems in this area, doesn't it?
19. Shanghai has more skyscrapers than Jakarta.
20. What about going to the school cafeteria?
=======Chúc bn hc tốt nhé=========
