II, Word form
13. impolitely
14. solar
15. consumption
16. effective
17. conserve
18. applications
C. Writing
31.One percent of the solar energy that reaches the Earth is enough to provide power for the total pollution.
32. The energy can be stored for a number of days, so on cloudy days you can use solar energy.
II, Sentence transformation
33. In spite of many energy -saving products , people don't want to use them.
34. It's time you look after yourself
35. Jame suggested Rob that he should come over there and help pick up the trash.
36. The laboratory is being worked with a lot of chemicals
