Exercise 7. Use the correct form of the words in brackets 1. Solar power can be used to ................ or cool our houses. (HOT) 2. There will be a ............... of energy in the near future. (SHORT) 3. Scientists are looking for clean and ................ resources of energy. (EFFECT) 4. Solar energy is plentiful and it can be replaced ..................... (EASY) 5. Nuclear power is expensive and ............. (DANGER) 6. We liked the ............ of that young pianist. (PERFORM) 7. My father drives his motorbike ............ so he never has accidents. (CARE) 8. What I like about festivals is that they show the ........... values of different communities. (CULTURE) 9. Solar energy is renewable, .......... and clean. PLENTY 10. We should reduce the use of .............. at home. (ELECTRIC) 11. The slums are often ................. with many people crammed into very small living spaces. (CROWD) 12. Most ................. energy sources are fossil fuels such as coal, petroleum, and natural gas. (RENEW) 13. Dean Kamen is ................ of the Segway scooter. (INVENT). 14. is about not having enough money to meet basic needs. (POOR) 15 materials can be processed and used again. (RECYCLE)