1、Unit 2 Saving the EarthTopic2 All these problems are very serious.pollutionmany trees cut downforests gonewash the earth away冲走冲走change into desert转换成，变成转换成，变成沙漠沙漠e.g. A lot of rich land has changed into desert because people have cut down too many trees. sandstormscome into being n. 沙尘暴沙尘暴The boy a
2、nd 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 for the first time.Listen and answer the questions 1.Whats the weather like
3、today ? Its bad. The wind is so strong . And the sand really hurts face.2.What causes these sandstorms ? People have cut down too many trees. As a result, a lot of rich land has changed into desert. 3.Do we still need to do something to protect the environment ? Yes, we do. Although we have built “T
4、he Green Great Wall”, we still need to do something to protect the environment . conj. 虽然，尽管，即使n.沙沙 BDo you know?A1c 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 t
5、he earth away. Trees functions K: wind; sand; anything M: sandstorms J: cut down; as a result; change into M: affect J: stopfrom; blow away K: can be saved J: wash away K: is harmful to; although; do something Act out the dialog in pairs 2 Complete the sentences with the correct forms of the given p
6、hrases 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 trees left, so the wind always _ the earth _. 3.Air pollution has become a serious problem, so we must _ to reduce it. 4.we shoul
7、d 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 intoblows awaydo somethingstopfromAs a result3 Do you know how sandstorms come into being? Number the pictures and talk about th
8、e sandstorm in groups.415362wash the earth awaymany treeschange into desertforests gonesandstorms come into beingcut down trees4 A. Listen to the passage and circle the phrases you hear. become weaker destroy the environment disappear rapidly on the earth enough bamboo to eat4 B. Listen again and fi
9、ll 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. Humans have _ _ _ the importance of protecting animals.5. We should _ _ _to protect them.do our bestin danger ofplenty ofcome to
10、understandfewer and fewer1. Lily, would you like _ to drink? 2. Cindy is very busy now. She needs _ to help her. 3. Is there _ wrong with your computer?4. Jim looked for his pencil-box _ , but he didnt find it. 5. I stayed at home last week. I didnt go _. Use someone, something, anything, somewhere,
11、 anywhere to fill in the blanks.something someone anythingsomewhereanywhere We 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.Read 1a.2.Memorize the useful expressions and key sentences which we learn today.3.Finish Section A in your workbook.4.Preview Section B.
