Topic2 All these problems are very serious.,Unit 2 Saving the Earth,Puzzle 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 e n f p r o t e c t r a d f e e a r t h t m t i e i m e a s e r f h b c w a t e r u e u e h t e f g I y l e l r e n v 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 e n f p r o t e c t r a d f e e a r t h t m t i e i m e a s e r f h b c w a t e r u e u e h t e f g I y l e l r e n v i r o n m e n t,A Puzzle Game :,提示：横6个，竖4个,wash forest protect earth water environment,weather,Lets watch the video.,sand + storm sandstorm,sand,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 away,many trees,change into desert,forests gone,sandstorms come into being,cut down trees,4,1,5,3,6,2,many trees,cut down trees,forests gone,wash the earth away,冲走,change into desert,转换成，变成,沙漠,/dez(r)t /,sandstorms come into being,Now, can you tell us how sandstorms come into being?,PLEASE HAVE A TRY!,many trees,cut down trees,forests gone,wash the earth away,change into desert,sand storms come into being,Long ago, there were .,But people built houses 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 . different types of sandstorms the reasons for sandstorms sandstorms in different cities,Task 1 Work 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.,People have _ too many trees. _ a lot of rich land has _ into desert. 2) Trees can _the wind _ the earth away. 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 result,changed,stop,from blowing,stop,from washing,Although,cut down,=though,三北防护林工程,Task 3 Work in groups Read 1a in groups and answer the following questions.,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 the earth away.,A. Trees can stop the wind from blowing the earth away.,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 human beings., although; do something,Act out the dialog in pairs,words and phrases,SUM UP,沙,沙尘暴,沙漠,虽然，尽管,转换成，变成,把.吹走,把.冲走,阻止.做某事,sand,although,change into,人，人类,human being,sandstorm,desert,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.,blow.away,wash.away,stop.from doing.,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 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 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 into,blows,away,do something,stop,from,As a result,Assignment,Recite 1a. Memorize the useful expressions and key sentences which we learn today. 3. Finish Section A in your workbook.,Thank you!,