复件Unit2Topic1SectionA

1、Unit 2 Saving the EarthTopic2 All these problems are very serious.The boy and girls are talking about .A.different types of sandstorms B.the reasons for sandstorms C.sandstorms in different cities 1b Listen to 1a and choose the best answer.Focus on the main idea of the conversation when you listen f

2、or the first time.1c Read 1a and complete trees functions. A. Trees can stop the wind from blowing the earth away. B. A lot of water can be saved by forests. C. They can also stop the water from washing the earth away. Trees functions K: 多么糟糕的天气呀！多么糟糕的天气呀！风是如此的大！沙子真的伤到我的风是如此的大！沙子真的伤到我的脸。当我在街上走的时候，我什

3、么也看不见。脸。当我在街上走的时候，我什么也看不见。 M: 听到这个我很难受听到这个我很难受。什么造成了这些沙尘暴？什么造成了这些沙尘暴？ J: 人们人们砍刀太多的树砍刀太多的树。结果，许多肥沃的陆地。结果，许多肥沃的陆地变成变成了沙漠。了沙漠。 M: 那太糟糕了。它是如何那太糟糕了。它是如何影响影响天气的？天气的？ J: 树可以树可以防止防止风将土风将土刮走刮走。 K: 大量的水可以大量的水可以被被森林森林储存储存。 J: 他们也可以阻止水将土他们也可以阻止水将土冲走冲走。 K: 砍树砍树对对人类、动物和植物都人类、动物和植物都有害有害。尽管尽管我们已经建造了我们已经建造了绿色长城，我么仍然

4、需要做很多事情绿色长城，我么仍然需要做很多事情去保护环境去保护环境。 Act out the dialog in pairs 2 Complete the sentences with the correct forms of the given phrases in the box. as a result, change into, do something, stopfrom, blowaway 1.People have cut down such a large number of trees that the land _desert. 2.There are fewer tree

5、s left, so the wind always _ the earth _. 3.Air pollution has become a serious problem, so we must _ to reduce it. 4.we should try our best to _ people _ cutting down the trees. 5.In the future, human beings can protect the trees well. _, animals will live a happy life in the forest. has changed int

6、oblows awaydo somethingstopfromAs a result3 Do you know how sandstorms come into being? Number the pictures and talk about the sandstorm in groups.415362wash the earth awaymany treeschange into desertforests gonesandstorms come into beingcut down trees4 A. Listen to the passage and circle the phrase

7、s you hear. become weaker destroy the environment disappear rapidly on the earth enough bamboo to eat4 B. Listen again and fill in the blanks.1. Now some kinds of animals are becoming _ _ _.2. Some animals are_ _ _dying out completely.3. In the past, pandas lived a quiet life and had _ _food.4. Huma

8、ns have _ _ _ the importance of protecting animals.5. We should _ _ _to protect them.do our bestin danger ofplenty ofcome to understandfewer and fewerWe learn: 1.Some words: sand, although 2.Some phrases: change into, human being 3.Some sentences: (1)As a result, a lot of rich land has changed into desert. (2)Trees can stop the wind from blowing the earth away.We can: 1. Use the indefinite pronoun and adverb. 2.Talk about the sandstorm and its harm.Summary1.Rea