1、Unit 2 Saving the EarthTopic2 All these problems are very serious.学习目标学习目标1.通过用具体的事例来学习谈论环境污染给通过用具体的事例来学习谈论环境污染给人类带来的具体危害。人类带来的具体危害。2.通过学习，我们会更加加深对环境问题的通过学习，我们会更加加深对环境问题的认识，进一步提高我们的环保意识。认识，进一步提高我们的环保意识。3.初识不定代词和副词的用法。初识不定代词和副词的用法。pollutionmany trees cut downforests gonewash the earth away冲走冲走change
2、into desert=turn.into.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1a Listen,look and say.Listen and answer the questions 1.Whats the weather like today?Its bad.The wind is so strong.And the sand really h
3、urts 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“The Green Great Wall”,we still need to do something to protect the enviro
4、nment.conj.虽然，尽管，即使n.沙沙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 for the first time.1c Read 1a and complete tr
5、ees 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 2 Complete the sentences with the correct forms of the given phrases in the box.as a result,change into,do something
6、,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 should try our best to _ people _ cutting down the trees.5.In the fut
7、ure,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 the sandstorm in groups.415362wash the earth awaymany treeschange into d
8、esertforests 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 fill in the blanks.1.Now some kinds of animals are becoming _ _ _.2.Some an
9、imals 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 understandfewer and fewerBDo you know?A 1.Lily,would you like _ to drink?2.Cind
10、y 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,anywhere to fill in the blanks.something someone anythingsomewhereanywhere We lea
11、rn: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.
