1、Topic2 All these problems are very serious.Unit 2 Saving the EarthPuzzle Game（益智游戏):(pair work)Find words as quickly as possible!两人一组,找出与环境有关的单词。w a s h j c a k s e w i a f o r e s t k t en f p r o t e c t r ad f e e a r t h t m t i e i m e a s e r f hb c w a t e r u e u e h t e f g I y l e l re n v
2、 i r o n m e n t提示：横6个，竖4个w a s h j c a k s e w i a f o r e s t k t en f p r o t e c t r ad f e e a r t h t m t i e i m e a s e r f hb c w a t e r u e u e h t e f g I y l e l re n v i r o n m e n tA Puzzle Game:提示：横6个，竖4个washforestprotectearthwaterenvironmentweatherLets watch the video.sand+storm sa
3、ndstormsand风暴，暴风雨n.沙n.沙尘暴 Do you know how sandstorms come into being?Number the pictures and talk about the sandstorm.()()()()()()()()()()()()wash the earth awaymany treeschange into desertforests gonesandstorms come into beingcut down trees415362many treescut down treesforests gonewash the earth aw
4、ay冲走change into desert转换成，变成沙漠/ddeezz(r)t(r)t/sandstorms come into beingNow,can you tell us how sandstorms come into being?PLEASE HAVE A TRY!PLEASE HAVE A TRY!many treescut down treesforests gonewash the earth awaychange into desertsand storms come into beingLong ago,there were.But people built hous
5、es and did other things,so they.too many.day by day.And slowly.disappeared.When it rained heavily,the water.Year after year,the land.When the wind.,sandstorms.The boy and girls are talking about.A.different types of sandstorms B.the reasons for sandstorms C.sandstorms in different citiesTask 1 Work
6、alone Listen to 1a and choose the best answer.Focus on the main idea of the conversation when you listen for the first time.听第一遍时，关注对话的大致意思。Task 2 Work alone Listen to 1a and fill in the blanks.1)People have _ too many trees._ a lot of rich land has _ into desert.2)Trees can _the wind _ the earth aw
7、ay.3)They can also _ the water _ the earth away.4)_ we have built the“The Green Great Wall”,we still need to do something to protect the environment.As a resultchangedstopfrom blowingstopfrom washingAlthoughcut down=though三北防护林工程Task 3 Work in groups Read 1a in groups and answer the following questi
8、ons.Read 1a in groups and answer the following questions.1)Whats the weather like?2)What causes these sandstorms?3)How can that affect the weather？Read 1a and complete trees functions.Trees functions（功能，作用)A._B._C._B.A lot of water can be saved by forests.C.They can also stop the water from washing
9、the earth away.A.Trees can stop the wind from blowing the earth away.K:wind;sand;anything M:sandstormsJ:cut down;as a result;change intoM:affect J:stopfrom;blow awayK:can be saved J:wash awayK:is harmful to human beings.,although;do somethingAct out the dialog in pairswords and phrasesSUM UP沙沙尘暴沙漠虽然
10、，尽管转换成，变成把.吹走把.冲走阻止.做某事sandsandalthoughchange into人，人类 human beingsandstormdesertsentences:(1)As a result,a lot of rich land has changed into desert.(2)Trees can stop the wind from blowing the earth away.blow.awaywash.awaystop.from doing.Complete the sentences with the correct forms of the given phr
11、ases in the box.as a result,change into,do something,stopfrom,blowaway1.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（减少）it.4.We should try our be
12、st 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 intohas changed intoblows blows awayaway do something do somethingstopstopfromfromAs a resultAs a result1.Recite 1a.2.Memorize the useful expressions and key sentences which we learn today.3.Finish Section A in your workbook.Thank you!
