2. 导入单词阅读复述作业欣赏

4. Water pollution Air pollution Soil pollution

8. New words : Area: 地区 Cattle: 牛 Cause: 原因 Limit: 限制 Gradually: 逐渐地 In place: 在适当的位置 Hillside ：山腰 Blow away: 刮走 Power: 动力 Mile: 英里 Chemical: 化学物 Time and time again: 多次 Sight: 视力 Lose one’s sight: 失明 Shore: 滨；岸 Present: 在场的 Dirty: 弄脏 Tanker: 油船 Pour: 倾泻 Square: 平方

9. Listen to the passage and answer the following questions: 1. Why are trees very important? 2. What is the cause of water pollution? Because trees can hold the soil in place on the hillside. Waste from factories and cities is the cause of water pollution.

10. Get the students to read the passage again and finish the following exercises: ( )1. The passage points out that many parts of the world with large populations and plenty of crops have become deserts. ( )2. Land may become poor if farmers do not limit the numbers of their cattle. ( )3. Good soil is gradually lost these days as trees are being cut down. ( )4. Air pollution and water pollution are the two causes of the problem that many parts of the world have become deserts. T T T F

11. ( )5. Chemicals in the smoke from power stations can travel hundreds of miles in the wind before falling down to the ground in the rain. However, the rain will not do any harm to man. ( )6. After a bad accident at a nuclear power station, 50% of the trees in Germany were damaged. ( )7. The examples of the accidents in both India and Russia are used by the writer to explain how water is polluted. F F F

12. Retell the passage : (use the pictures and the sentences to help) The area of desert is growing.

13. Retell the passage: Too many sheep and cattle All the grass be eaten Grass never grow again; the land become desert

14. Retell the passage: trees be cut down nothing to hold… soil be washed into… soil be blown away

15. Retell the passage: travel ; fall to the ground in the rain Chemicals in smoke cause a lot of damage.

16. Retell the passage: trees be destroyedfish be killed

17. Retell the passage: smoke from factories, power stations and cars

18. Retell the passage: I. II. Time : Place : Results : Time : Place : Results : 1986 at a nuclear power station in Russia 125,000 die 1984 at a factory in the town of Bhopal in India 2500 be killed; many lose sight accidents

21. waste from factories and cities

22. 1989 35,000 34,000 10,000 4,800 a sinking oil tanker

23. 1.Copy the new words. 2.Finish workbook exercise 2 and 3.