2. interview 采访 The woman is interviewing the famous people.

3. air conditioner 空调

4. insect 昆虫 The insects look wonderful

5. 警告 warn Go and warn the students not to walk on the thin ice.

6. root 根 The root of the tree is very strong ．

7. danger n. dangerous.adj. 危险 The snake will attack you, it is dangerous.

8. burn burned 燃烧 The mountain is burning, the smoke is thick.

9. 摧毁 destroy The earthquake in Shichuan destroyed all the things.

10. 污染 pollution 垃圾 rubbish The river is full of pollution, they are all the rubbish.

11. without Fish will die without water.

12. Interview natural Air conditioner Insect Warn Join Root Pass Communicate Danger Burn Destroy Pollution Article Rubbish Noise without 采访 自然的, 天然的 空调 昆虫 警告 加入 树根 传递, 给 pass sb. Sth/ pass sth. To sb. 交流 \ 沟通 危险 be in danger 燃烧 摧毁 污染物 文章 垃圾 噪音 没有

13. Unit 2 Protecting our environment

14. CARTOON TALK Let’s watch! Guess??? What topic will be talked about in this unit ? seed 种子

15. READING Before you read 1 What can we get from the trees? Things we get from trees that we can … use drink eat wear

16. 2 Do we need more or fewer trees in Guangzhou? Why do you think so. More? Fewer?

17. Have you ever planted a tree ? Where did you plant it ? Why did you plant it ?

18. 3 Before you read the interview on page 18, try this quiz about trees. 1.How long do they live? Match the items on the left with the average ages on the right. 1234512345 mice trees Tortoises ( 乌龟 ) Whales （鲸鱼） People abcdeabcde 70 years 150 years 40 years 4,000 years 3 years

19. 4 Before you read the interview, look at the title, the introduction and the pictures. Then say whether the following statements are T (True) or F (False). 1.The “pollution fighters” are probably scientists.( ) 2. Many useful things come from trees.( ) 3.Trees give out harmful gases.( ) 4. Trees can pass information to one another.( ) F T F T

20. 5 Read the interview and answer the following questions: 2. 2.Some people say, “Trees are natural air conditioners.” Do you know why? 3. 3. Some people say, “Trees can communicate with each other.” Do you know how? 4. 4. What can they do when they join their roots together? 1. 1. What can we get from trees? 5. 5. Are trees in danger? Why?

21. Question 1 What can we get from trees? We can get many things from trees, such as fruits, drink, cloth, paper, rubber, furniture and so on.

22. Question 2 Some people say, “Trees are natural air conditioners.” Do you know why? Trees can clean the air. Trees can cool the air.

23. Question 3 Some people say, “Trees can communicate with each other.” Do you know how? root They can communicate with each other by joining their roots together.

24. Question 4 What can they do when they join their roots together? They warn each when insects attack them. They pass each other food and water.

25. Question 5 Are trees in danger? Why ? People cut down trees. People burn forests. We are destroying our best pollution fighters. Who are pollution fighters mentioned in the interview?

26. A3: Rita is asking May questions about trees. May is giving Yes or No answers. Read Rita’s questions and complete May’s answers with one or more words from the interview. 1RITAWe get some useful things from trees. Is that right? MAY_______. Two examples are ______________________. 2RITATrees do two main things to the air. Is that true? MAY______. They ___________________________________. 3RITAOne tree has the power of 15 air conditioners. Is that right? MAY______. One tree has the power of __________________________________. Yes wood and rubber Yes cool and clean the air No five air conditioners

27. 4RITADo scientists know a lot about trees? MAY______. They are _______________________________. 5RITACan trees communicate with one another? MAY______. For example, if insects ___________________ ______________________________________________. 6RITACan trees help one another? MAY______. For example, they can ____________________ ______________________________________________. 7RITAEvery year, there are fewer and fewer trees in the world. Is that true? MAY______. People _________________________________ every year. No only now beginning to understand them Yesattack a tree, it can warn the other trees around it Yesjoin their roots together, and pass each other food and water Yes cut down and burn millions (of trees)

28. 7.Can you say something about trees: Trees are the biggest and oldest living thins on Earth. Trees are useful for many things, such as the wood, the rubber, the paper and so on. Trees are natural air conditioners. They cool the air and clean it. Trees can communicate with each other. Trees are in great danger because we cut down and burn millions every year.

29. 7. Judy wrote the notes below. But she made some mistakes about trees. Correct these mistakes. Trees: 1. live much longer than people; 2. produce wood, rubber, paper; 3. take oxygen from the air; 4. heat the air; 5. are like air conditioners; 6. cannot protect themselves against insects; 7. can share food and water with one another; 8. Are in danger, mainly from insects OK give oxygen into the air cool the air OK can OK … mainly from people

30. 2 Read the interview. JUDY Why are you so interested in trees, Doctor Ray? DR RAY They’re the biggest and oldest living things on Earth, Judy. JUDY But what are they useful for? DR RAY Many things. For example, the wood in your pencil, the rubber on the end of your pencil, and the paper in your notebook all come from trees. Also, do you enjoy fresh air? Judy is collecting some facts for a class project on pollution. She is interviewing Doctor Ray, a scientist, about trees.

31. JUDY Of course. DR RAY Well, trees are natural air conditioners. They cool the air and clean it. Three trees can do the job of 15 air conditioners. JUDY You know a lot about trees, Doctor. DR RAY Not really. Scientists are only now beginning to understand them. For example, when insects attack a tree, it can warn the other trees around it. Some trees can also join their roots together underground, and pass each other food and water. Trees are communicating with one another, but we don’t know how.

32. JUDY Are trees in danger? DR RAY Yes, they are in great danger. We cut down and burn millions every year. We are destroying our best pollution fighters.

33. 1.Some trees can also join their roots together underground, and pass each other food and water. 有些树木的根也会在地下相连，互相传递养料和 水分。（ P18 ） 2. Trees are communicating with one another, but we don’t know how. 树木在互相沟通，但我们不知道是怎样（沟通）。 （ P18 ）

34. each other 与 one another 两个短语都是表示 “ 互相 ” ，意义和用法接近，一般情况下可用 each other 替换 one another ，如强调两者之 间的 “ 互相 ” ，常用 each other, 而 one another 多指三个以上事物的 “ 互相 ” 。如： 李明和陈平在学习上常常互相帮助。 Li Ming and Chen Ping often help each other in study. 我们的老师经常教导我们要互相学习。 Our teacher often tells us to learn from one another.

35. 选择 each other 或 one another 填空。 1.Li Jie and Simon write to __________ every month. 2. The football players passed the ball to ____________ to reach the final goal.. each other one another

36. 2. Are trees in danger? 树木处在危险中吗？（ P18 ） in danger 意为 “ 处于危险中 ” ， “in + 表示状态 的名词 ” 时，表示 “ 处于 …… 状态 中 ” ，在句子 中作状语。又如， in trouble“ 处于困难中 ” 。

37. 根据中文意思完成句子。 1. 由于环境污染, 很多植物处在危险中。 Many plants ____ ___ _______ because of environmental pollution. 2. 她知道自己处于危险中于是报警。 She knew she ____ ____ _____, so she called the police. are in danger was in danger

38. Expressions 1. be interested in... 2. living things 3. be useful for... 4. on Earth 5. communicate with... 6. one another 7. in danger 8. cut down 对 …… 感兴趣 生物 对 …… 有用处 在地球上 与 …… 交流 互相 处于危险中 砍掉

39. 根据中文意思完成句子。 1. 这棵树枯萎了，所以我不得不把它砍掉。 The tree died, so I had to ____ it ____. 2. 孩子们常相互开玩笑。 The children often play jokes on ____ ______. 3. 地球上有数以百万计的生物。 There are millions of _____ _____ ___ ______. 4. 当人们处于极度危险中时，通常会尖叫。 People usually scream when they ___ __ great ______. cut down one another living things on Earth are in danger

40. 选择适当的短语填空，注意其适当形式。 communicate with, be interested in, be useful for 1.Sally _____________ Mickey Mouse. She likes collecting photos of him. 2. A good dictionary _________ English learners. 3. It is said that ants can _______________ one another by touching their feelers （触 角）. is interested in is useful for communicate with

41. After you read 1Write a summary about trees. You may start like this: Trees are important to our life. We can get … from trees. Trees can …

42. 2 What can we do to protect our pollution fighters? Discuss with your classmates and write some suggestions.