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1、Unit 3 Science Versus Nature,Period Four Task,Skills building 1: changing or correcting a text,We are often asked to do things like filling in a form or taking down telephone numbers, names and addresses. When information is passed between people, it often contains mistakes. Such information must be
2、 checked and corrected when it is recorded incorrectly. For example:,1. You may have to correct grammatical errors and spelling mistakes. 2. You may have to make changes to the information in the text. 3. You may need to change the style or tone of the text.,Remember to: 1. read the questions or ins
3、tructions carefully 2. listen closely when spellings are given 3. pay attention to words or phrases that express contradiction, such as: No, I dont think so. Thats not right. Are you sure? And I think it should be ,Listen to the tape and correct the following sentences. 1. Legs can be lengthened by
4、up to 8cm. 2. Legs are made to grow 1mm per week. 3. The new bone is not as strong as the original bone.,18cm,every day,Passage One,4. A 45-year-old man died after trying to grow by 6cm. 5. Patients cant do any exercise for three years. 6. It takes 14 months to increase your height by 12cm. 7. Age o
5、f patients: 16 to 55. 8. 5% of operations are unsuccessful. 9. Costs RMB185,000.,A 35-year-old,two,18,60,8%,8500,Tapescript : M: Hi, Catherine. What are you doing? C: Just going over our notes on height- increasing operations. M: Yes, it took us a long time to finish them. Whats the problem? C: I ca
6、nt read some of my writing, so perhaps we can go over the notes together so I can check for any mistakes.,M: Yes, sure. Ill try to remember what we said before. C: According to my notes, the doctors break the bones of your legs and then make them grow by about eight centimeters? M: I think youve got
7、 that wrong. The doctors can make them grow by about eighteen centimeters.,C: Thats one millimeter per week, right? M: No. Every day. C: Yes, I see. So, the bone is not as strong as the original? M: The bone is as strong as the original. C: Oh! I also wrote that a forty-five- year old man dies after
8、 trying to make his legs grow by six centimeters?,M: No, he was only thirty-five years old. C: Thats young! When the operation is complete, patients cant do any exercise for three years. Is that right? M: No! After two years. C: Wow! I got a lot of this wrong then. What about increasing your height
9、by twelve centimeters in fourteen months?,M: No, eighteen months. C: And the age of the patients who can have this operation. It is between sixteen and fifty-five. M: No, that should be between 16 to 60. C: And how many operations are unsuccessful? M: 8%.,C: And the cost is RMB185000. M: No, its abo
10、ut RMB8500. C: Phew. I did get a lot of things wrong, but I think thats all. Thanks for having such a good memory. I will see you tomorrow. Bye. M: Ok. I will look over the note when you have typed them. Bye, now.,Genetically Modified (GM) food,Passage two,cherry tomato,含乙肝疫苗的转基因土豆,Listen and correc
11、t the following notes 1. Growth hormones are used in meat, eggs and vegetables. 2. Growth hormones make animals grow fatter. 3. Growth hormones keep animals healthy.,faster,dont help keep animals healthy.,4. GM food is more expensive than natural food. 5. GM food technology is a new scientific devel
12、opment. 6. GM food tastes better than natural food. 7. Free-range food comes from animals that are given drugs.,cheaper,isnt,the same as,arent,8. Free-range food is cheaper than GM food. 9. Free-range animals are kept in dark sheds. 10. Most people wouldnt pay more for free-range food.,more expensiv
13、e,arent,dont mind paying,Tapescritp: S= Student S= Scientist S: Thank you for taking the time to come and talk to us about GM food. S: Its my pleasure. S: Im glad I have the opportunity to talk to you before the lecture. Id like to ask some questions. S: Ok, what would you like to know?,S: Well, why
14、 are growth hormones used in meat, eggs and vegetables? S: Actually, theyre only used in meat. S: Oh, I dont know that. Why do farmers use growth hormones? S: They use them in order to make animals grow faster. S: I guess hormones can also keep animal healthy.,S: No, thats not true. The hormones dont help keep them healthy. They can still become ill. S: Oh! I didnt now that. So what are the advantages of GM food then? S: Well, its ch
