2. 珠晖二中 欧阳良骥

3. 1. Learn some new words and phrases: sand, cut down, change … into …, prevent, prevent … from, although, cut off, leader Teaching aims and demands

4. 2. Learn to talk about pollution and its harm. 3. Review the indefinite pronoun and adverb.

5. Air pollution

6. Water pollution

7. Litter

8. Is the classroom tidy? Review. The classroom is tidy. ( )throws litter about, so it’s a good behaviour Nobody

9. ( )throws litter about. It’s a bad behaviour. Someone

10. The panda is crying. It hasn’t enough food to eat. ( )must do ( )bad to destroy the environment. So it is a bad behaviour. Someone something

11. A group of students are planting trees. ( )should plant more trees. It’s a good behavior. Everyone

12. How do the sandstorms come into being? many trees/forest cut down trees forest gone Wash the earth away change into desert sandstorms come into being

13. 1a.Look,listen and say

14. Kangkang : What bad weather! The wind is blowing strongly with lots of sand. I can’t see anything, and my face hurt while I was walking down the street just now. Maria: I’m sorry to hear that. But what causes these sandstorms?

15. Jane: People have cut down too many trees. A lot of rich land has changed into desert. Maria: That’s bad, but how can these trees affect the weather? Jane: Trees can stop the wind from blowing the earth away. Maria: And a lot of water can be saved by forests.

16. Jane: They can also prevent the water from washing the earth away. Kangkang: Cutting down trees is harmful to human beings, animals and plants. Although we have built the Great Green Wall, we still need to work hard to protect the environment.

17. 1) What is the weather like ? Answer the questions The wind is blowing strongly with lots of sand. People have cut down too many trees. Forests. Forests 2) What may cause sandstorm? 4) What can prevent water from washing the earth away? 3) What can stop the wind from blowing the earth?

18. Read 1a and make some notes. 1b.Work alone Trees can stop the wind from blowing the earth away. They can prevent the water from washing the earth away.

19. Pair work Do you know the relations between trees, human beings and sandstorms? Number the pictures and then talk about them with your partner.

20. （ 1 ） （ 2 ）（ 3 ） （ 4 ） （ 5 ） （ 6 ）

21. It was reported on November 23, 2005 that harmful things from a chemical factory polluted the Songhua River in the northeast of China. It caused Harbin City to cut off its water supply for five days. The leaders paid great attention to this event. Pollution of the Songhua River

22. Saving Water Water is very important to human beings, but not everybody knows how to save it. As a student, what should you do?

23. Discuss different ways of saving water. As a student, what should we do to save water? Group work

24. 指点迷津 1.A lot of rich land has changed into desert. A lot of 许多， 大量。相当于 lots of. 即可修 饰可数名词又可修饰不可数名词。修饰不可 数名词时相当于 a great deal of. We have a lot of (a great deal of ) work to do. Change..into 把 … 变成.. Change rich land into desert.

25. 2. Trees can stop the wind from blowing the earth away. Stop… from / prevent..from sth./doing sth. 阻 止某人 / 某物做某事。 from 可以省略。 What can we do to prevent the disease spreading?

26. 3. Although we have built the Great Green Wall, we still need to work hard to protect the environment. Although 尽管, 虽然 相当于 though ， 引导让步状语从句。 不能和 but 连用。 Although my uncle is old, he looks very strong and healthy.

27. 4. What bad weather! 多糟糕的天气呀 ! weather 不可名 what 后跟不可名 ( news 新闻 ) 5. The wind is blowing strongly with lots of sand. wind 风刮得猛用 strongly. rain 雨下得大用 hard/heavily.eg: It’s raining hard7. wash away 冲走 blow away 吹走；刮走 6. A lot of water can be saved by forests. 许多的水被森林贮 存.( 被动语态 : be+ 动词的过去分词 ) 7. Cutting down trees is harmful to human beings. 动词 ing 作主语, 谓语动词用单三. 8. Although …,we still need to work hard to protect the environment. although = though 不能与 but 连用 ; to + 动原 “ 表目的 ”

28. 9.It caused Harbin City to cut off its water supply for five days. cause sb. to do sth. 引导 / 引起某人做某事. What caused his illness? cut off 中断， 切断。 We were cut off in the middle of our conversation. cut down 砍伐

29. 课堂练习 1. Our teacher have told us _____ the trees. A. cut off B. cut down C. not to cut off D. not to cut down 2. ________ they can swim, ____ they never go swimming alone. A. Although, but B. Though, but C. Although, / D. Because, so D C

30. 3.The policemen tried to prevent traffic accidents ________ happening. A. from B. in C. to D. with 4.He didn’t cross the road until the red traffic lights changed ______ green ones. A. to B. into C. for D. in 5._____ bad weather! We have to stay at. home. A. What a B. How C. How a D. What A B D

31. Please write a short speech. The title is : What Should We Do to Protect Water Resource as a Student? Homework: