1、Unit 2 Saving the Earth,Topic2 All these problems are very serious.,Section A,Words and Expressions,pollution,many trees,cut down,forests gone,wash the earth away,冲走,change into desert,转换成，变成,沙漠,e.g. A lot of rich land has changed into desert because people have cut down too many trees.,sandstorms,c
2、ome into being,n. 沙尘暴,The boy and girls aretalking about . different types of sandstorms the reasons for sandstorms 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 question
3、s,1.Whats the weather like today ? Its bad. The wind is so strong . And the sand reallyhurts 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.
4、Although we have built “The Green GreatWall”, we still need to do something to protect the environment .,conj. 虽然，尽管，即使,n.沙,somebody, someone, something, somewhereanybody, anyone, anything, anywherenone, nobody, nothing, nowhereeverybody, everyone, everything, everywhere,一般情况下用于肯定句,一般情况下用于否定句和疑问句,表否
5、定含义,可用于各种句式,the indefinite pronoun and adverb,1.I have _ to tell you. A. important something B. something important,B,形容词修饰不定代词和不定副词时，要放在不定代词/不定副词之后,Do you know?,2.Everybody _ ready for the match. A. is B. are,A,不定代词作主语时，谓语动词要用单数。,1a Listen, look and say.,1c Read 1a and complete trees functions.,Tre
6、es can stop the wind from blowing the earth away. A lot of water can be saved by forests. They can also stop the water from washing the 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 awa
7、y K: is harmful to; although; do something,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 thatthe land _desert. 2.There are few
8、er 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 future, human beings can protect the trees well._, animals will live a happy life in the forest.,has changed
9、 into,blows,away,do something,stop,from,As a result,3 Do you know how sandstorms come into being? Numberthe pictures and talk about the sandstorm in groups.,( ),( ),( ),( ),( ),( ),4,1,5,3,6,2,wash the earth away,many trees,change into desert,forests gone,sandstorms comeinto being,cut down trees,4 A
10、. Listen to the passage and circle the phrases you hear.,become weakerdestroy the environmentdisappear rapidly on the earthenough bamboo to eat,4 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, pand
11、as lived a quiet life and had_ _food. 4. Humans have _ _ _ the importance of protecting animals. 5. We should _ _ _to protect them.,do our best,in danger of,plenty of,come to understand,fewer and fewer,Lily, would you like _ to drink? Cindy is very busy now. She needs _ to help her. Is there _ wrong
12、 with your computer? Jim looked for his pencil-box _ , but he didnt find it. I stayed at home last week. I didnt go _.,Use someone, something, anything, somewhere, anywhere to fill in the blanks.,something,someone,anything,somewhere,anywhere,Exercises,We learn: 1.Some words: sand, although 2.Some ph
13、rases: 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.,Summary,Assignment,Read 1a. Memorize the useful expressions and key sentences which we learn today. Finish Section A in your workbook. Preview Section B.,Thank you!,