Unit 2 Saving the EarthTopic2 All these problems are very serious.Section ASection A 霍尔奇中学霍尔奇中学 刘刘 鑫鑫pollutionmany trees cut downforests gonewash the earth away冲走冲走森林change into rich land 良田良田desert沙漠沙漠把把变为变为 sandstormscome into being n. 沙尘暴沙尘暴3 Do you know how sandstorms come into being? Number the pictures and talk about the sandstorm in groups.( )( )( )( )( )( )( )( )( )( )( )( )415362wash the earth awaymany treeschange into desertforests gonesandstorms come into beingcut down treesThe 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.=sort=kindListen and answer the questions 1.Whats the weather like 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 “The Green Great Wall”, we still need to do something to protect the environment . n.沙子沙子1c 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 the earth away. Trees functions Language pointsTrees can stop the wind from blowing the earth away.树木能木能够防止大防止大风吹走土壤。吹走土壤。stopfrom doing sth. ：阻止：阻止/防止防止做某事做某事blowaway :吹走吹走e.g.：我：我们能能够阻止人阻止人们砍伐砍伐树木。木。We can stop people from cutting down trees. Language pointsCutting down trees is harmful to human beings.Cutting down trees does harm to human beings. =do harm to Language pointsAlthough we have built “The Green Great Wall”, we still need to do something to protect the environment.虽然我然我们已已经建立了建立了“绿色色长城城”，但是我，但是我们仍然需仍然需要做一些事情去保要做一些事情去保护环境。境。something 不定代不定代词定定义：不明确指代某些事物或某些人的代：不明确指代某些事物或某些人的代词叫做不叫做不定代定代词。Though虽然虽然(但是）但是）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 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 future, human beings can protect the trees well. _, animals will live a happy life in the forest. has changed intoblows awaydo somethingstopfromAs a result4A. Listen to the passage and circle the phrases you hear. become weakerdestroy the environmentdisappear rapidly on the earthenough bamboo to eat4 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, 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 fewerHomework1.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.Thank you!