1. d. for
2. c. for
3. d. for - of
4. b. reduce
5. a. energy - saving
6. a. homestead
7. d. Finally
8. b. very large
9. c. an electrician
10. a. why not
B.
11. appliances
12. producer
13. efficiency
14. consumption
15. effectively
III. A.
1. d. take
2. a. give up
3. a. look after
4. b. off
5. d. therefore
6. c. contacting
7. b. energy enough
8. b. or
9. a. come
10. d. and
11. b. however
12. c. because
13. d. use - can save
14. b. pick it up
15. c. you should finish
B.
16. D. wash→ washing
17. D. wake up you→ wake you up
18. B. would get→ will get
19. B. to go→ went
20. C. reach→ reaches
4.The world's energy resources is limited so we should use them economically.
5. The country could face an energy crisis if demand continued to rise.
6. You can't borrow my dictionary unless you bring it back on Monday.
7. Solar domestic heating systems are economical to use but the cost of installation is very high.
8. Solar pannels are placed on the roof of a house and the Sun' energy is used to heat water.
9. He is a good teacher, however, I don't agree with a lot of his teaching methods.
10. We'd better not waste water or we won't have enough to drink sooner or later.
