=>
2. We are looking for cheap and clean and effective sourced of energy.
3. Will fossil fuels be replaced by solar and wind within 20 years?
4. I have visited Yaly hydroelectric power plant twice.
5. The first hydroelectric power plant was built in Niagara Falls in 1879.
6. You should switch off electricial appliances when they aren't in use.
7. Despite being the most polluting of fossil fuels, coal is still the largest sources of energy worldwide.
8. People will use biogas for fuel in homes and for transport.
9. Solar panels will be installed on the roof of our house next week.
10. A new school will be built for poor children next month.

2. We are looking for find cheap and clean and effective sourced of energy 

3. Will fossil fuels be replaced within 20 years by solar and wind ?

4. I have visited Yaly hydroelectric power plant twice

5. The first hydroelectric power plant was built at Niagara Falls in 1879

6. You should switch off electrial appliances when they are not in use

7. Despite being most polluting of fossil fuels , coal is still the largest source of energy worldwwide

8. People will use biogas for fuel in homes  and for transport

9. Solar panels will be installed on the roof of our house next week

10. A new school will be built for poor children  next month 

XIN LỖI NHA TAY MÌNH BỊ ĐAU NÊN GÕ LÂU