5.

1.Less electricity will be used in the future.

2.Public transport will be used by the students in my school when they are travel long distances.

3.The lights will be turned off when I leave a room or go to bed.

4.A great deal of energy will be offered next century.

5.Sources of energy will be used more effectively for our future.

6.The use of biogas will be increased by the people in the contryside for cooking.

7.A hydro power station will be built in the North of the country next decade.

8.The problem of energy shortage will be solved by using solar energy.

6.

1.They will be learning English this time tomorrow.

2.We will reduce the use of electricity to save our energy.

3.Wind will be a renewable source of energy in our country.

4.Coal will be replaced by another renewable source.

5.I think biogas is abundnt and cheap for cooking and heating.

6.Solar energy will be used by many countries in the world.

7.Petroleum is a non-renewable energy source because it takes a long time to replace it.

8.Alternative sources of energy will be developed effectively in our country.

9.Will we use public transportation when travelling long distances?

10.Why are the wind and the sun called alternative sources of energy?

=>

5/

1. Less electricity will be used in the future. 

2. Public transport will be used by the students in my school when travelling long distances. 

3. The lights will be turned off by me when leaving a room or going to bed. 

4. A great deal of energy will be offered by wind power next century. 

5. Sources of energy will be used more effectively for our future. 

6. The use of biogas will be increased by people in the countryside for cooking.  

7. A hydro power station will be built in the North of the country next decade. 

8. The problem of energy shortage will be solved by using solar energy. 

6/

1. They will be learning English this time tomorrow. 

2. We will reduce the use of electricity to save our energy. 

3. Wind will be a renewable source of energy in our country. 

4. Coal will be replaced by another renewable source.

5. I think biogas is abundant and cheap for cooking and heating. 

6. Solar energy will be used by many countries in the world. 

7. Petroleum is a non-renewable energy source because it takes a long time to replace it. 

8. Alternative sources of energy will be developed effectively in our country. 

9. Will we use public transportation when travelling long distances?

10. Why are the wind and the sun called alternative sources of energy?