1、Unit 3 Science versus nature課題 Unit 3 Science versus nature課型復(fù)習(xí)課教學(xué)目標(biāo)把握考點(diǎn)，規(guī)范寫作重點(diǎn)重點(diǎn)詞匯，句型2,4,6難點(diǎn)規(guī)范寫作教法講授法、討論法、探究法教學(xué)過程教 學(xué) 內(nèi) 容 個(gè)案調(diào)整教師主導(dǎo)活動(dòng)學(xué)生主體活動(dòng) Forth periodProject 1: Man versus nature For a long time, our environment has been damaged because humans have been careless. People have harmed nature through a

2、griculture, fishing, hunting and tourism. We further damage Earth by building new channels in the sea and factories on the land, and by creating pollution with chemical waste. We will some day destroy the planet we live on if we continue in this way.However, if we focus only on conservation, then pe

3、ople may suffer. Not everything that is best for nature is good for people. Would anyone say that development should be stopped in favor of nature? From the point of view of some people, we are only doing what humans have always done, using nature to meet our own needs. Other people argue that such

4、thinking may cause a catastrophe, unless we start to look around and understand how a clean environment benefits us all. After decades of destroying nature and using up natural resources, many developed nations are now concerned about saving nature rather than developing or destroying it. However, m

5、any poorer nations must focus on meeting the everyday needs of their people. In doing so, they are using up natural resources at a fast pace. They have not yet seen the effects of the careless use of the environment like many wealthy nations have. Often they do not realize that the choices they make

6、 are bad for the environment. Should they be blamed for destroying hundreds of thousands of acres of rainforest if it means a better income for their people? The developed and developing countries of the world need to work together to make sure that people enjoy healthy and happy lives, without the

7、environment around them suffering. It should not be a question of humans winning and nature losing. Humans can only really win by protecting nature. After all, food has to be produced in a healthy, natural system, and we all need clean air to breathe and pure water to drink. It is mankinds responsib

8、ility to find answers that are good for everyone, and everything.Project 2: GM food: hope or danger?In recent years, there has been great progress in the study of genetics. With this progress, doors have been opened up to technologies that never existed before. While many people are excited about th

9、ese new technologies, these same technologies frighten others. Nowhere is this truer than with genetically modified (GM) food. There are two ways in which a plant or an animal can be genetically modified. First, new material can be inserted into its DNA to give the plant or animal qualities which it

10、 would never have in nature. Second, material can be taken from the DNA of a plant or an animal in order to remove qualities which are not desired. One aim of GM research is to produce food which will make us healthier. So far, this technology has been used to produce plants which are better able to

11、 defend themselves against pests and disease. Supporters of GM food argue that GM plants are healthier and have larger harvests. While there has been research in GM animals such as pigs, no GM meat is being sold at present. Many questions have been raised about GM food. No one really knows whether i

12、t is safe for animals or humans to eat. Scientists admit that more tests should be done on GM food. Research has been limited to increasing production profits, rather than making sure that GM foods are safe. GM food could therefore be dangerous to eat. There is also a question as to whether GM plant

13、s are safe for the environment. Since GM crops are planted outside, they are part of the food chaininsects and other animals eat them or use their products, and these insects and animals will be eaten by yet other animals. No one knows what effects the GM material might have on the food chain. Since

14、 no one really knows whether GM food is safe, many countries have hesitated to give permission for the production of GM foods, as they would rather be cautious with this new technology.Step 1: Read and learn Listen to the text and grasp the general spirit of the text Language focus: 1. consider vt.

15、考慮；認(rèn)為考慮；認(rèn)為知識(shí)探究：Im considering changing my job. 我在考慮還份工作。Were considering selling the house. 我們正在考慮賣掉房子。I consider what he said as reasonable. 我認(rèn)為他說的有道理。 She considers it impolite to talk while eating. 她認(rèn)為吃飯的時(shí)候說話是不禮貌的。He was generally considered to have invented the first computer.人們普遍認(rèn)為是他發(fā)明了第一臺(tái)計(jì)算機(jī)。W

16、e consider Jack to have let out the secret. 我們認(rèn)為是杰克泄露了秘密。歸納整理：consider作“考慮”講時(shí),其后可接名詞、代詞、動(dòng)名詞或賓語從句,也可接由how, what等引導(dǎo)的不定式,但不可直接接不定式。consider + n. / pron. consider + doing. consider +從句consider +疑問詞+to do consider為“認(rèn)為”時(shí),后接that從句,復(fù)合賓語或帶不定式的復(fù)合結(jié)構(gòu),但不可接動(dòng)名詞,結(jié)構(gòu)表示如下：consider + that.consider +賓語+(to be/ as)+n./ad

17、j.consider + sb. to have done sth.consider + it + adj./ n.(+for sb.) to do sth.題練落實(shí)：B) 1. All the staff in our company are considering _ to the city center for the fashion show. A. to goB. goingC. to have gone D. having goneB) 2. Columbus was considered _ the great land of America. A. to discoverB.

18、to have discovered C. discovering D. having considered B) 3. -I cant stand Jack. He is too inefficient! -Nobody is perfect. Try to be _ to others. A. consideringB. considerate C. considerable D. considered B) 4. _ his high social status, it is really hard for us to _ his joining us in going west to

19、teach children there.A. Considered; prevent from B. Considering; opposeC. To consider; persuadeD. Being considered; object toB) 5. He wasnt made president of the board of directors, _ not very popular with all its members.A. to be considered B. being consideredC. considering D. having considered解析：句

20、意：他未被任命為董事會(huì)主席，因?yàn)槿藗冋J(rèn)為他不太受成員歡迎。因?yàn)榫渥拥闹髡Z與非謂語動(dòng)詞是動(dòng)賓關(guān)系，應(yīng)用現(xiàn)在分詞被動(dòng)式作原因狀語。C、D項(xiàng)為主動(dòng)形式，不定式結(jié)構(gòu)表示將來的動(dòng)作，與題意不符。C) 6. The car burns more fuel, but _ all things into consideration, its still a good car. A. taken B. having taken C. taking D. to take D) 7. You surely cant _ him to be a selfish man, for he is ready to help

21、 anyone in trouble. A. doubt B. remain C. advise D. consider B) 8. Have you considered _ him for help? A. ask B. asking C. to ask D. asked D) 9. his inexperience, he has done a very good job, so you should give him something as a (an) _. A. Considered; award B. Given; reward C. Regard; gift D.Consid

22、ering; prize A) 10. It always made us embarrassed that when we tried to greet him politely, we were still considered _ . A. to be rude B. being rude C. to being rude D. to have been rude解析: 此句中consider意為“認(rèn)為”，其結(jié)構(gòu)為：consider.(to be)+adj./n.聯(lián)想拓寬：consider的名詞形式是consideration,與其相關(guān)的常用詞組有：out of consideratio

23、n for出于對(duì)的考慮;體諒 be worthy of consideration值得考慮be under consideration在討論中 take sth. into consideration考慮到,顧及,把考慮在內(nèi)have consideration for others為別人著想 give ones careful consideration加以慎重考慮 in consideration of考慮到;作為對(duì)的回報(bào)(= in return for) considerate adj.體貼的;考慮周全的 considering prep. / conj.考慮到;就而言(3)conside

24、r.as.表示“把當(dāng)作來看待”, 此外以下結(jié)構(gòu)也可以表示這一含義：regard. . . as. . . / respect. . . as. . . / accept. . . as. . . / recognize. . . as /think of. as: / think. . . to be / have. . . as / look on. . . as / treat. . . as considerate adj. 體貼的,考慮周到的considerable adj. 相當(dāng)多的,相當(dāng)大的consideration 考慮,體貼,報(bào)酬considering prep. & conj

25、. 考慮,就而言be considerate towards sb. 對(duì)體貼be considerate to do sth. 做考慮周到的in consideration of 作為對(duì)的回報(bào),考慮到take into consideration (account) 考慮某事物,體諒某事物under consideration 在考慮中 閱讀理解：Special trees that grow faster, fight pollution, produce better wood, and even sense chemical attacks are being planted by sc

26、ientists in the US.When 40 per cent of Hawaiis US$14 million-a-year papaya (木瓜)industry was destroyed by a virus five years ago, work began on creating genetically engineered (轉(zhuǎn)基因的) trees.Researchers successfully introduced seeds that were designed to resist the virus. Since then, more and more peop

27、le have been testing genetically engineered trees.Some researchers put special bacteria into trees to help them grow faster and produce better wood. Others are trying to create trees that can clean polluted soil.Meanwhile fruit farmers are looking for trees that are strong enough to resist worms, an

28、d paper companies want trees that produce more wood and therefore more paper.The Pentagon (五角大樓，美國(guó)國(guó)防部所在地) even gave the researchers US$500,000 this year after they developed a pine tree that changes its colours if it senses a chemical attack.So far, the poplar, eucalyptus (楊樹與桉樹), apple and coffee t

29、rees are among those being engineered. All these can be done today because we have a better understanding of tree genomes (基因組).However, some people fear that the genetically engineered trees will cause dangerous results. They are worried that the new trees will breed with natural species and change

30、 the balance of the forest environment.“It could be destructive,” said Jim Diamond, an environmentalist. “Trees are what is left of our natural environment and home to many endangered species.”But researchers insist that science could give nature a fighting chance against both natural and man-made d

31、angers.They hope to answer the critics by stopping the new trees from breeding, so their effect on the environment can be controlled.C) 1. Which kind of tree is not the ones that scientists are planting in the US?A. Trees that worms cant hurt.B. Trees that can react to a chemical attack.C. Trees tha

32、t can resist wind better. D.Genetically engineered trees.B) 2. What caused the American scientists to work on special trees?A. They think science could give nature a fighting chance against both natural and man-made dangers. B. Great numbers of trees have been lost due to attacks by viruses. C. Rese

33、archers successfully introduced seeds designed to resist the virus.D. Tree genomes are mapped out so scientists know how to improve trees.A) 3. Which of the following was probably the first kind of trees being engineered?A. Papaya.B. Pine.C. Apple.D. Poplar.A) 4. Why did critics think engineered tre

34、es dangerous? Because _.A. these trees may eventually destroy the balance of natureB. everything except trees has been genetically engineeredC. trees are home to many endangered species D. these trees will replace normal trees 寫作能力培養(yǎng)：當(dāng)前，家長(zhǎng)普遍認(rèn)為現(xiàn)在孩子的行為習(xí)慣沒有他們自己小時(shí)候的好。請(qǐng)你根據(jù)下表所提供的信息寫一篇英語文章，簡(jiǎn)單介紹一下這種現(xiàn)象及出現(xiàn)這種現(xiàn)象的原因，并針對(duì)這種現(xiàn)象提一些建議?，F(xiàn)象家長(zhǎng)小時(shí)候懂禮貌、尊重別人、循規(guī)蹈矩現(xiàn)在的小孩不樂于助人、不尊重別人、崇尚自由。原因1互聯(lián)網(wǎng)及電視節(jié)目中不良信息的影響2家長(zhǎng)和老師過分關(guān)注學(xué)生成績(jī)，忽視對(duì)學(xué)生行為習(xí)慣的培養(yǎng)建議（提出至少兩點(diǎn)建議）注意：1對(duì)所給要點(diǎn)逐一陳述，適當(dāng)發(fā)揮，不要簡(jiǎn)單翻譯。2詞數(shù)150左右。開頭已經(jīng)寫好，不計(jì)入總詞數(shù)。Nowadays, a large numbe