1. Fossil fuels reserves are limited, so we are trying to find ___________ sources of energy which are unlimited. 2. A tall, thin structure with parts that turn round, used to change the power of the wind into electricity is called __________. 3. All fossil fuels are ____________ resources that cannot be replaced after use. 4. Wind power is the fastest growing ____________ of energy in the world. 5. Another renewable source of energy is ____________ heat which comes from deep inside the earth. 6. People use ____________ to run machines, heat and cool their homes. 7. Fuel supplies are nearly____________, so we need to look for alternative sources of energy to replace them. 8. 10 000 birds were _________ at the ceremony yesterday. They flew into the sky and dissappeared. 9. A lot of ____________ dams have been built to use the power of water and produce electricity. 10. These days jobs have been ____________, but it’s difficult for someone to look for a good one. 11. We should make __________ of sources of energy suitably. 12. We have only 45 minutes for this lesson. We have ____________ time for it. 13. The country has the large ___________ of coal which are available to be used in the future or when it is needed. 14. ________ power can be very dangerous although it can provide enough electricity for the world’s needs. 15. His love for Jane is unconditional and __________. He says it will never end.