1、Unit 4extinctiondinosaurinspectincidentdust fiercen.灭绝；消亡n.恐龙vt.检查；视察n.事件；事变n.灰尘；尘土；尘埃adj.凶猛的；猛烈的Words previewcome into beingaccording to形成；产生按照；根据所说Expressions previewAnimal extinctionFast reading1.When did dinosaurs live?2.When did dinosaurs die out?Tens of millions of years ago.About 65 million y
2、ears ago.3.According to the UN report,how many animals and plants have disappeared in the last 500 years.844Detailed reading:True or false1.1.There were many different kinds of dinosaur and all of them have been found in China.2.2.Not long ago,a rare new species of bird-like dinosaur was discovered
3、in Henan Province.a numberLiaoningFF3.Some scientists are sure dinosaurs died out because the earth got too hot for the dinosaurs to live on any more.4.Dinosaurs died out suddenly about 65 million years ago and many animals have disappeared in the last 500 years.FTthink Discuss the possible reasons
4、for the disappearance of dinosaurs.Think about what is mentioned in the text.1.It came after an unexpected incident when a huge rock from space hit the earth and put too much dust into the air.2.The earth got too hot to live on.Discuss the possible reasons for the disappearance of dinosaurs.There ma
5、y be other reasons for it.For referenceThe sudden mass extinction of the non-avian dinosaurs,which occurred around 65 million years ago,is one of the most intriguing mysteries in paleontology(古生物学).The nature of the event that caused this mass extinction has been extensively studied since the 1970s.
6、At present,several related theories are broadly supported by paleontologists:Asteroid collision Multiple collisionsEnvironment changesdodo渡渡鸟Before listening to the dodos story,try to predict in pairs how it might have become extinct.Listen to the tape and choose the sentence on page 30 which gives
7、the main idea of the story:This story is about how the dodo became extinct.No 1 is wrong.It is not fair to blame the dodo for his disappearance.No 3 only explains half the story.The dodo and man did become friends but only because man wanted to kill the dodos as easily as possible.No 4 is wrong beca
8、use the other animals and birds did not do much to save the dodo.They warned him but did not help him.Listen to the tape and choose the correct answer to complete each sentence on page 30.Keys:1 C 2 B 3 CListening textThe story of the dodo Once upon a time I lived on the island of Mauritius.I was ca
9、lled“dodo”.There were many of us and we were friends with all the other animals on the island.One day a new animal came to my island.His name was Man,and at first we seemed to be good friends.We wenteverywhere together and I shared my food with him.However,I began to wonder why several of my dodo fr
10、iends had disappeared.Then the number of our species began to decrease quickly.I was so worried that I asked the other animals and they all told me,“Your friends are being killed and eaten by Man while you are hunting for food.”Had Man eaten them?I couldnt believe it!When I asked Man directly,he see
11、med surprised.“I havent seen the other dodos either.”he said.“Maybe someone else killed them.”I believed him but when more dodos disappeared I set a trap.I went off as if I was going to hunt but instead I hid in the forest and waited.Sure enough Man came along.He ran after the last of my dodo friend
12、s and killed her.I felt so angry that I rushed out of my hiding place and straight at Mans spear.He killed me too.After that there were no more dodos in the world.So my motto is:be careful who you trust.1 a type of reptile(爬行动物)which stopped existing about 60 000 000 years ago.There were many differ
13、ent types of dinosaur,some of which were extremely large.2 an old-fashioned person or thing that people no longer consider to be useful:This typewriters a bit of a dinosaur,isnt it?1 dinosaur n.C2 come into being 形成；产生1.A new rule will soon come into being.一个新规则很快就要出台了。2.A car comes into being throu
14、gh a series of complex operations.汽车经过一连串的复杂作业程序而制成。3 inspectvt.检查；视察1.It was strange that nobody inspected my ticket before I got on the train.很奇怪，我上火车前，竟然没有人查看我的车票。2.Police were called out to keep at the airport,and inspect the arriving planes.警察们被紧急召集起来去守卫机场，并对到达的飞机进行检查。4 incident n.Can event whi
15、ch is either unpleasant or unusual:an isolated/serious/unfortunate incidentA youth was seriously injured in a shooting incident on Saturday night.5 dust n.Udry dirt in the form of powder that covers surfaces inside a building,or very small dry pieces of earth,sand or other substances:The furniture w
16、as covered in dust and cobwebs(蜘蛛网).A cloud of dust rose in the air as the car roared past.6 fierce adj.1 physically violent and frightening:a fierce attack/battleTwo men were shot during fierce fighting last weekend.2 strong and powerful:Fierce winds/seas prevented the race from taking place.3 show
17、ing strong feeling or energetic activity:There is fierce competition to join the Special Branch.4 US INFORMAL difficult:The chemistry exam was fierce!7 according to 按照；根据所说1.According to facts in my possession he can not possibly be guilty.根据我所掌握的事实，他是不可能有罪的。2.According to these figures,our company
18、is doing well.从这些数字来看，我们的公司经营得不错。In pairs choose another endangered animal which you know about.Analysewhy this animal is endangered.over hunted lack of foodhabitat is being threatenedFor exampleAnimal Habitat Reason for problemPolar bearWhite RhinoNorth PoleAfrica Warming of the seas means it is lo
19、sing its habitat of ice flows1 Destruction of the grasslands where it lives 2 Hunting for its horn3 Too friendly and so easily caughtINTENTIONPURPOSEIm going to to help/saveI intend/mean/plan to to protect fromI will so that Discuss what you might do to save it.Useful phrasesI feel like Id like to I
20、m ready to Id rather not in order to but do to teach them a lessonto punish those who do harm to wildlifeSupport zoos,reserves,and organizations that help animals.Volunteer your money,time and ideas.Everyone shares a responsibility in helping to save endangered animals that live on Earth.Here are so
21、me ways we can help all wildlife:WAYS TO SAVE ENDANGERED ANIMALS Avoid buying any products made from endangered animals.Learn all about endangered animals and share this information with everyone.Dont pollute.Write a letter to WWF based on what you have discussed,asking them to help you save your en
22、dangered animals.All letters have a start and an ending.The language used depends on how well the writer knows the person to whom he/she is writing.(pay attention to the guidelines on your book)FormalInformal Starts Dear,Hi,My dear,Dearest,Endings Yours sincerely,Sincerely,Sincerely yours,Yours truly,Yours faithfully,Love,Cheers,Regards,Best wishes,Yours,Homework1.Review the words and expressions weve learned.2.Finish the exercises on the Workbook.
