1、Unit 4extinctionextinctiondinosaurdinosaurinspectinspectincidentincidentdust dust fiercefiercen. n. 灭绝；消亡灭绝；消亡n. n. 恐龙恐龙vt. vt. 检查；视察检查；视察n. n. 事件；事变事件；事变n. n. 灰尘；尘土；尘埃灰尘；尘土；尘埃adj. adj. 凶猛的；猛烈的凶猛的；猛烈的Words previewcome into beingcome into beingaccording toaccording to形成；产生按照；根据所说Expressions previewAn
2、imal extinctionAnimal extinctionFast reading1. When did dinosaurs live? 2. When did dinosaurs die out? Tens of millions of years ago. About 65 million years ago.3. According to the UN report, how 3. According to the UN report, how many animals and plants have many animals and plants have disappeared
3、 in the last 500 years.disappeared in the last 500 years.844Detailed reading: True or falseDetailed reading: True or false 1. 1.There were many different kinds of There were many different kinds of dinosaur and all of them have been dinosaur and all of them have been found in China.found in China.2.
4、 2.Not long ago, a rare new species of Not long ago, a rare new species of bird-like dinosaur was discovered bird-like dinosaur was discovered in Henan Province.in Henan Province.a numberLiaoning FF3. Some scientists are sure dinosaurs died out because the earth got too hot for the dinosaurs to live
5、 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 for the disappearance of dinosaurs. Think about what is mentioned in the text. 1. It came after an unexpected incident when a huge rock
6、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 Discuss the possible reasons for the disappearance of for the disappearance of dinosaurs. There may be dinosaurs. There may be other reasons for it.other reasons for it.For
7、referenceFor reference The sudden The sudden mass extinctionmass extinction of the non- of the non-avian dinosaurs, which occurred around avian dinosaurs, which occurred around 65 million years ago, is one of the most 65 million years ago, is one of the most intriguing mysteries in intriguing myster
8、ies in paleontologypaleontology ( (古生古生物学物学) ). The nature of the event that caused . The nature of the event that caused this mass extinction has been extensively this mass extinction has been extensively studied since the 1970s. At present, several studied since the 1970s. At present, several rela
9、ted theories are broadly supported by related theories are broadly supported by paleontologists:paleontologists:Asteroid collision Multiple collisions Environment 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 choos
10、e the Listen to the tape and choose the sentence on page 30 which gives the sentence on page 30 which gives the main idea of the story:main idea of the story: This story is about how the dodo became extinct. No 1No 1 is wrong. It is not fair to blame the is wrong. It is not fair to blame the dodo fo
11、r his disappearance.dodo for his disappearance. No 3No 3 only explains half the story. The dodo only explains half the story. The dodo and man did become friends but only and man did become friends but only because man wanted to kill the dodos as because man wanted to kill the dodos as easily as pos
12、sible.easily as possible. No 4No 4 is wrong because the other animals is wrong because the other animals and birds did not do much to save the dodo. and birds did not do much to save the dodo. They warned him but did not help him.They warned him but did not help him.Listen to the tape and choose the
13、 Listen to the tape and choose the correct answer to complete each correct answer to complete each sentence on page 30. 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 called “dodo”. There were many of us and we wer
14、e 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 went everywhere everywhere together and I shared my together and I shared my food with him. However, I began to food with him. However, I began
15、to wonder why several of my dodo friends wonder why several of my dodo friends had disappeared. Then the number of had disappeared. Then the number of our species began to decrease quickly. I our species began to decrease quickly. I was so worried that I asked the other was so worried that I asked t
16、he other animals and they all told me, “Your animals and they all told me, “Your friends are being killed and eaten by Man friends are being killed and eaten by Man while you are hunting for food.” Had while you are hunting for food.” Had Man eaten them? I couldnt believe it!Man eaten them? I couldn
17、t believe it! When I asked Man directly, he seemed When I asked Man directly, he seemed surprised. “I havent seen the other dodos surprised. “I havent seen the other dodos either.” he said. “Maybe someone else either.” he said. “Maybe someone else killed them.” I believed him but when killed them.”
18、I believed him but when more dodos disappeared I set a trap. I more dodos disappeared I set a trap. I went off as if I was going to hunt but went off as if I was going to hunt but instead I hid in the forest and waited. instead I hid in the forest and waited. Sure enough Man came along. He ran Sure
19、enough Man came along. He ran after the last of my dodo friends and after the last of my dodo friends and killed her. I felt so angry that I rushed killed her. I felt so angry that I rushed out of my hiding place and straight at out of my hiding place and straight at Mans spear. He killed me too. Af
20、ter Mans spear. He killed me too. After that there were no more dodos in the that there were no more dodos in the world. So my motto is: be careful who world. So my motto is: be careful who you trust.you trust. 1 a type of reptile (1 a type of reptile (爬行动物爬行动物) which ) which stopped existing about
21、60 000 000 years stopped existing about 60 000 000 years ago. There were many different types of ago. There were many different types of dinosaur, some of which were extremely dinosaur, some of which were extremely large.large.2 an old-fashioned person or thing that 2 an old-fashioned person or thin
22、g that people no longer consider to be useful:people no longer consider to be useful:This typewriters a bit of a dinosaur, This typewriters a bit of a dinosaur, isnt it?isnt it?1 dinosaur n. C2 come into being 2 come into being 形成；产生形成；产生1. A new rule will soon come into being. 1. A new rule will so
23、on come into being. 一个新规则很快就要出台了。一个新规则很快就要出台了。2. A car comes into being through a 2. A car comes into being through a series of complex operations. series of complex operations. 汽车经过一连串的复杂作业程序而制汽车经过一连串的复杂作业程序而制成。成。3 inspect3 inspectvt. vt. 检查；视察检查；视察1. It was strange that nobody inspected my 1. It w
24、as strange that nobody inspected my ticket before I got on the train. ticket before I got on the train. 很奇怪，我上火车前，竟然没有人查看我很奇怪，我上火车前，竟然没有人查看我的车票。的车票。 2. Police were called out to keep at the 2. Police were called out to keep at the airport, and inspect the arriving planes. airport, and inspect the ar
25、riving planes. 警察们被紧急召集起来去守卫机场，并对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。到达的飞机进行检查。 4 incident n. C4 incident n. Can event which is either unpleasant or an event which is either unpleasant or unusual:unusual: an isolated / serious / unfortunate incident an isolated / serious / unfortunate incidentA youth was se
26、riously injured in a shooting A youth was seriously injured in a shooting incident on Saturday night.incident on Saturday night. 5 dust n. U5 dust n. Udry dirt in the form of powder that dry dirt in the form of powder that covers surfaces inside a building, or very covers surfaces inside a building,
27、 or very small dry pieces of earth, sand or other small dry pieces of earth, sand or other substances:substances: The furniture was covered in dust and The furniture was covered in dust and cobwebs (cobwebs (蜘蛛网蜘蛛网). ).A cloud of dust rose in the air as the car A cloud of dust rose in the air as the
28、 car roared past.roared past.6 fierce adj.6 fierce adj. 1 physically violent and frightening:1 physically violent and frightening:a fierce attack / battlea fierce attack / battleTwo men were shot during fierce fighting Two men were shot during fierce fighting last weekend.last weekend.2 strong and p
29、owerful:2 strong and powerful:Fierce winds / seas prevented the race Fierce winds / seas prevented the race from taking place.from taking place. 3 showing strong feeling or energetic 3 showing strong feeling or energetic activity:activity:There is fierce competition to join the There is fierce compe
30、tition to join the Special Branch.Special Branch.4 US INFORMAL difficult:4 US INFORMAL difficult:The chemistry exam was fierce!The chemistry exam was fierce!7 according to 7 according to 按照；根据按照；根据所说所说1. According to facts in my possession he can 1. According to facts in my possession he can not pos
31、sibly be guilty.not possibly be guilty. 根据我所掌握的事实，他是不可能有罪的。根据我所掌握的事实，他是不可能有罪的。 2. According to these figures, our company 2. According to these figures, our company is doing well. is doing well. 从这些数字来看，我们的公司经营得不错。从这些数字来看，我们的公司经营得不错。 In pairs choose another endangered In pairs choose another endange
32、red animal which you know about. Analyse animal which you know about. Analyse why this animal is endangered.why this animal is endangered.over hunted over hunted lack of foodlack of foodhabitat is being threatenedhabitat is being threatenedFor exampleFor exampleAnimal Animal Habitat Habitat Reason f
33、or problemReason for problemPolar Polar bearbearWhite White RhinoRhinoNorth PoleAfrica Warming of the seas means it is losing 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 inte
34、nd/mean/ plan to to protect fromI will so that Discuss what you might do to save it. Discuss what you might do to save it. Useful phrases Useful phrasesI feel like Id like to Im ready to Id rather not in order to but do to teach them a lessonto punish those who do harm to wildlife Support zoos, rese
35、rves, and organizations that help animals. Volunteer your money, time and ideas. Everyone shares a responsibility in helping Everyone shares a responsibility in helping to save endangered animals that live on to save endangered animals that live on Earth. Earth. Here are some ways we can help all wi
36、ldlife:Here are some 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
37、help you save your endangered 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)FormalFormalInformal Informal Starts Starts Dear, Dear, Hi, My Hi, My dear,dear,
38、Dearest,Dearest,Endings Endings Yours sincerely,Yours sincerely,Sincerely, Sincerely, Sincerely yours,Sincerely yours,Yours truly,Yours truly,Yours faithfully,Yours faithfully,Love,Love,Cheers,Cheers,Regards,Regards,Best wishes,Best wishes,Yours,Yours,HomeworkHomework1. Review the words and expressions 1. Review the words and expressions weve learned.weve learned.2. Finish the exercises on the 2. Finish the exercises on the Workbook.Workbook.
