Uint8 I. Basic Listening Practice 1. Script M: Scentists claim the world population has 99.5% of the same DNA W: But this doesnt tell us there is no such thing as race Q What is true of the dna of difference races? 2. Script W: With the advent of the genetic map we know where everything is, but do we know where to go with it M: Your map seems to differ largely from my geographical map Q: What does the man imply? 3. Script M: As you know, it has taken millions of years of evolution and natural selection to get us where we are today W: Yes, but now that we have genetic engineering, we seem to have decided that we want to be God Q: What does the woman imply? 4. Script M: I think the research into cloning will lead us into dangers filling us with false hopes of perfe W: It's too late to turn back the clock. We'll just have to depend on common sense to solve uncommon problen Q What does the woman mean 5. Script W: In America, many prisoners are having their cases reviewed, and some have ever M: Except for the ones whose death sentence has already been carried out Q: What can we learn about DNA testing from the dialog? m B 2C 3.D 4.A 5.C Listening in Task 1: Stem Cell research Script Gregory: The Republican party in America is opposing stem cell research. I find it
Uint8 II. Basic Listening Practice 1. Script M: Scentists claim the world population has 99.5% of the same DNA. W: But this doesn’t tell us there is no such thing as race. Q: What is true of the DNA of difference races? 2. Script W: With the advent of the genetic map we know where everything is, but do we know where to go with it? M: Your map seems to differ largely from my geographical map! Q: What does the man imply? 3. Script M: As you know, it has taken millions of years of evolution and natural selection to get us where we are today. W: Yes, but now that we have genetic engineering, we seem to have decided that we want to be God. Q: What does the woman imply? 4. Script M: I think the research into cloning will lead us into dangers, filling us with false hopes of perfection. W: It’s too late to turn back the clock. We’ll just have to depend on common sense to solve uncommon problems. Q: What does the woman mean? 5. Script W: In America, many prisoners are having their cases reviewed, and some have even been freed through DNA testing. M: Except for the ones whose death sentence has already been carried out. Q: What can we learn about DNA testing from the dialog? Keys: 1.B 2.C 3.D 4.A 5.C III. Listening In Task 1: Stem Cell Research Script Gregory: The Republican party in America is opposing stem cell research. I find it
hard to believe that in this day and age someone would do that Lillian: Stem cell research sounds pretty impressive, I'll admit. But just what is it? Gregory: Well, a stem cell is a special type of cell. It is a general cell that, when it devides, can become any specif ic type of cell Lillian: You mean, a stem cell can become a heart cell? Or a brain or a kidney cell? Gregory: That's about it. Stem cells are a part of the body' s maintenance and repair stem. When they divide, they can become any cell type Lillian: I guess there would be some tremendous med ical advantages in that sort of research Gregory: You' ve said a mouthful. Recently, scientists were able to help a man who lost a jawbone for cancer. They recreated bone material for his jaw from stem cells. What it means is that since the new bone was created out of the person's own cells, there was no problem with rejection because the dNA was the same Lillian: I bet the person was delighted. Why would anyone oppose that sort of research? It would seem to have endless potential to benefit the human race Gregory: I agree, but there are people who think we should not interfere with nature and manipulatewhat is natural Lillian: It's easier to hold such a narrow view if you're not in a position to need the benefits of the research. If you' re missing a jawbone because of cancer, you probably support the research 1. What is the mainly about? 2. Who is against stem cell research? 3. What is special about a stem cell? 4. When can a stem cell become another cell type? 5. Accord ing to the passage, why do some people oppose stem cell research? Keys: 1. B 2.A 3.A 4.A 5D Task 2: The Improvement of rice Script Scientists now know a lot more about a grain that people have eaten for ten thousand years. (S1) Research teams around the world have completed a map of the(S2)genes of rices. The find ings appeared last week in the(s3)ioumal Nature The aim is to speed up the improvement of rice. The scientists(S4) warn that the kinds of rice plants used now have reached the limit of their(S5)productivity. Yet world rice production must(S6) grow by an estimated 30 percent in the next twenty to meet demand By 2025, as many as 4.6 billion people will depend on rice for (S7) survival. There is a lot of pressure on breeders to improve the crop, and the rice genome is a valuable tool to do that.( S8)Plant breeders have already used preliminary information from the rice genome to create experimental strains of rice
hard to believe that in this day and age, someone would do that. Lillian: Stem cell research sounds pretty impressive, I’ll admit. But just what is it? Gregory: Well, a stem cell is a special type of cell. It is a general cell that, when it devides, can become any specific type of cell. Lillian: You mean, a stem cell can become a heart cell? Or a brain or a kidney cell? Gregory: That’s about it. Stem cells are a part of the body’s maintenance and repair system. When they divide, they can become any cell type. Lillian: I guess there would be some tremendous medical advantages in that sort of research. Gregory: You’ve said a mouthful. Recently, scientists were able to help a man who lost a jawbone for cancer. They recreated bone material for his jaw from stem cells. What it means is that since the new bone was created out of the person’s own cells, there was no problem with rejection because the DNA was the same. Lillian: I bet the person was delighted. Why would anyone oppose that sort of research? It would seem to have endless potential to benefit the human race. Gregory: I agree, but there are people who think we should not interfere with nature and manipulate “what is natural”. Lillian: It’s easier to hold such a narrow view if you’re not in a position to need the benefits of the research. If you’re missing a jawbone because of cancer, you probably support the research. 1. What is the passage mainly about? 2. Who is against stem cell research? 3. What is special about a stem cell? 4. When can a stem cell become another cell type? 5. According to the passage, why do some people oppose stem cell research? Keys: 1.B 2.A 3.A 4.A 5.D Task 2: The Improvement of Rice Script Scientists now know a lot more about a grain that people have eaten for ten thousand years. (S1) Research teams around the world have completed a map of the (S2) genes of rices. The findings appeared last week in the (S3) journal Nature. The aim is to speed up the improvement of rice. The scientists (S4) warn that the kinds of rice plants used now have reached the limit of their (S5) productivity. Yet world rice production must (S6) grow by an estimated 30 percent in the next twenty to meet demand. By 2025, as many as 4.6 billion people will depend on rice for (S7) survival. There is a lot of pressure on breeders to improve the crop, and the rice genome is a valuable tool to do that. (S8) Plant breeders have already used preliminary information from the rice genome to create experimental strains of rice
that better resist cold and pests The researchers also say rice is an excellent choice for genetic mapping and engineering. Rice genes have only about 390 million chemical bases. That maight sound like a lot. But other major food grains have thousands of millions(S9)The new map could better explain more than iust rice. Rice shares a common ancestor with other cereal crops. Because rice is the first cereal crop to be fully analyzed researchers expect that sufficient knowledge of its genetic information will reveal the heredity of more complex grains, includ ing corn, wheat and barley (S10)While significant progress has been made in the analysis of the rice genome. the mapping of human genes is also making headway, When scientists can identify and manipulate genes that cause certain diseases, mankind will cure them easily. The human genetic map may help us control a persons height, weight, appearance and even length of life Task3: The first Cloned cat Scrip In the age-old battle of cats and dogs, score one for the cats. Researchers at Texas A&M University recently announced that they have successfully cloned a cat name Rainbow- the first pet ever cloned-after several years of unsuccessful efforts to clone a dog name missy The ork, financed by a company hoping to prov ide pet-cloning services to wealthy owners, adds cats to a growing list of successfully cloned animals that includes pigs sheep, cattle and I The success demonstrates cloning is a technology that could be transferred to other animal families as well. The accomplishment may prov ide new tools for studying d iseases such as cats'AIDS a valuable research model for aids in humans Research into animal cloning remains an important scientific alternative until the issue of human cloning is settled. And that seems unlikly in the immed iate future, for it involves religious and moral principles. There are, for example, groups that insist no one should be allowed to take on the role of god the creator To create cloned cat embryos for the experiment, researchers transferred DNA from adult cat cells into egg cells stripped of their own genetic information. Out of 82 attempts with cloned embryos, one attempt resulted in a failed pregnancy, and another yielded a kitten named CC, delivered from a surrogate mother on December 22. The kittens name refers to"Carbon Copy"and "Copycat", the name of the cloning Cloning attempts with dogs have proven unsuccessful in part because dogs reproductive cycles are more complicated The technique may also work with endangered cats such as the African wild cat fishing cat and blackfooted ca Ironically, the increased knowledge of cat reproduction may best be suited for
that better resist cold and pests. The researchers also say rice is an excellent choice for genetic mapping and engineering. Rice genes have only about 390 million chemical bases. That maight sound like a lot. But other major food grains have thousands of millions. (S9) The new map could better explain more than just rice. Rice shares a common ancestor with other cereal crops. Because rice is the first cereal crop to be fully analyzed, researchers expect that sufficient knowledge of its genetic information will reveal the heredity of more complex grains, including corn, wheat and barley. (S10) While significant progress has been made in the analysis of the rice genome, the mapping of human genes is also making headway. When scientists can identify and manipulate genes that cause certain diseases, mankind will cure them easily. The human genetic map may help us control a person’s height, weight, appearance and even length of life. Task3: The First Cloned Cat Script In the age-old battle of cats and dogs, score one for the cats. Researchers at Texas A&M University recently announced that they have successfully cloned a cat name Rainbow—the first pet ever cloned—after several years of unsuccessful efforts to clone a dog name Missy. The ork, financed by a company hoping to provide pet-cloning services to wealthy owners, adds cats to a growing list of successfully cloned animals that includes pigs, sheep, cattle and mice. The success demonstrates cloning is a technology that could be transferred to other animal families as well. The accomplishment may provide new tools for studying diseases such as cats’ AIDS, a valuable research model for AIDS in humans. Research into animal cloning remains an important scientific alternative until the issue of human cloning is settled. And that seems unlikly in the immediate future, for it involves religious and moral principles. There are, for example, groups that insist no one should be allowed to take on the role of God the Creator. To create cloned cat embryos for the experiment, researchers transferred DNA from adult cat cells into egg cells stripped of their own genetic information. Out of 82 attempts with cloned embryos, one attempt resulted in a failed pregnancy, and another yielded a kitten named CC, delivered from a surrogate mother on December 22. The kitten’s name refers to “Carbon Copy” and “Copycat”, the name of the cloning project. Cloning attempts with dogs have proven unsuccessful in part because dogs’reproductive cycles are more complicated. The technique may also work with endangered cats such as the African wildcat, fishing cat and blackfooted cat. Ironically, the increased knowledge of cat reproduction may best be suited for
developing cat contraceptives to control the U.S. cat population 1. Which of the following would be the best title for the passage? 1. What did researchers at Texas A&M University recently announce? 2. Which animals are NOT mentioned in the passage as having been cloned? 3. Accord ing to the passage, why is human cloning unl ikely to happen in the near 4. What does the passage say about the pregnancy and birth in cat cloning? Keys: IA 2. B 3. C 4.B 5.C IV Speaking out MODEL 1 Why are people protesting against genetically modified foods? Susan: With so many people suffering from malnutrition around the world, why are people protesting against genetically mod if ied foods? Chris: Some people are protesting about genetically mod ified foods, but even more people are protesting the fact that processed foods containing these Susan: But why should they be labeled? Chris: Not everyone is sure that genetically modified foods are safe. They want to be certain that biotech foods have the sme composition as organic foods Susan: But there are more urgent problems in this world. Many people are dying of starvatIo Chris: But those who arent starving may want genetically modified foods to be labeled so they know what food s they should andd shouldnt eat Susan: You know. I heard of a genetically modified fish that grew to be ten times its normal size Chris: That sure sounds abnormal Susan: Yeah, it does sound a bit strange, but that fish could feed ten times as many eople Chris: You're right; genetically mod if ied food might help solve world hunger, But I think we have a right to know what we are eating MODEL Do you think the cloning of humans should be forbidden by law? Script Susan: After the cloning of Dolly the sheep I think human cloning is next John: Whoa. I have some reservations about it. There are stll many scientific problems
developing cat contraceptives to control the U.S. cat population. 1.Which of the following would be the best title for the passage? 1. What did researchers at Texas A&M University recently announce? 2. Which animals are NOT mentioned in the passage as having been cloned? 3. According to the passage, why is human cloning unlikely to happen in the near future? 4. What does the passage say about the pregnancy and birth in cat cloning? Keys: 1.A 2.B 3.C 4.B 5.C IV. Speaking Out MODEL 1 Why are people protesting against genetically modified foods? Susan: With so many people suffering from malnutrition around the world, why are people protesting against genetically modified foods? Chris: Some people are protesting about genetically modified foods, but even more people are protesting the fact that processed foods containing these ingredients aren’t labeled. Susan: But why should they be labeled? Chris: Not everyone is sure that genetically modified foods are safe. They want to be certain that biotech foods have the sme composition as organic foods. Susan: But there are more urgent problems in this world. Many people are dying of starvation. Chris: But those who aren’t starving may want genetically modified foods to be labeled so they know what foods they should andd shouldn’t eat. Susan: You know, I heard of a genetically modified fish that grew to be ten times its normal size. Chris: That sure sounds abnormal. Susan: Yeah, it does sound a bit strange , but that fish could feed ten times as many people. Chris: You’re right; genetically modified food might help solve world hunger. But I think we have a right to know what we are eating. MODEL2 Do you think the cloning of humans should be forbidden by law? Script Susan: After the cloning of Dolly the sheep, I think human cloning is next. John: Whoa. I have some reservations about it. There are stll many scientific problems
to solve before human cloning starts Susan: There's an easier way. The Clonaid Company says they ve cloned humans John: Oh, my God! These guys claim aliens from another planet taught them human cloning Susan: a woman gave them half a million dollars to clone her dead daughter John: Clearly that woman doesn't know much about cloning. How risky it is Susan: I know it's inefficient. It took 276 tries to produce Dolly. But why is it risky? John: Cloned animals grow abnormally large and age unnaturally fast Susan: In other words, that woman may not be happy with her cloned daughter. John Then there are the emotions no one knows if cloning damages the mind Susan: Do you think the cloning of humans should be forbidden by law? John: To my mind, the cloning of human organs shouldnt be prohabited. It may help solve medical problems Susan: I see your point: cloning should be regulated if it's to benefit humanity. MODEL3 Is it interfering with nature? Scrip Nora: Some religious groups are opposed to genetic research. They believe it's interfering with nature John: I know. But nature can be pretty hard-nosed too, so we often need to interfere with her-we build dams to control flooding Nora: There're many diseases that are a part of nature, and they cause people a great deal of misery: cancer and d iabetes, for example John: a better understand ing of the genetic code that controls our body would be a great help in curing many diseases Nora: The project to map the human genetic code. what's that called? John: The genome project. As you say, it has tremendous promise to make our lives better-just in the abil ity to identify and correct genetically-caused diseases like alzheimer 's Nora: Some d iseases like cancer are also believed to have a genetic switch John: That's right, and once researchers identify the switch, perhaps they can turn off cancer or Alzheimer 's Nora: People are also concerned that science will enable us to determine such qualities as intelligence and height John: You know it's going to happen--it's iust a matter of when Nora: Imagine if everyone was a combination of Yao ming and Albert einstein John: But what if they get it wrong, and you wind up with Yao Mings knowledge of nuclear physics and Albert Einstein's heigl Nora: All those religious groups would say that it served you right
to solve before human cloning starts. Susan: There’s an easier way. The Clonaid Company says they’ve cloned humans. John: Oh, my God! These guys claim aliens from another planet taught them human cloning. Susan: A woman gave them half a million dollars to clone her dead daughter. John: Clearly that woman doesn’t know much about cloning. How risky it is! Susan: I know it’s inefficient. It took 276 tries to produce Dolly. But why is it risky? John: Cloned animals grow abnormally large and age unnaturally fast. Susan: In other words, that woman may not be happy with her cloned daughter. John: Then there are the emotions. No one knows if cloning damages the mind. Susan: Do you think the cloning of humans should be forbidden by law? John: To my mind, the cloning of human organs shouldn’t be prohabited. It may help solve medical problems. Susan: I see your point: cloning should be regulated if it’s to benefit humanity. MODEL3 Is it interfering with nature? Script Nora: Some religious groups are opposed to genetic research. They believe it’s interfering with nature. John: I know. But nature can be pretty hard-nosed too, so we often need to interfere with her—we build dams to control flooding. Nora: There’re many diseases that are a part of nature, and they cause people a great deal of misery: cancer and diabetes, for example. John: A better understanding of the genetic code that controls our body would be a great help in curing many diseases. Nora: The project to map the human genetic code…what’s that called? John: The genome project. As you say, it has tremendous promise to make our lives better—just in the ability to identify and correct genetically-caused diseases like Alzheimer’s. Nora: Some diseases like cancer are also believed to have a genetic switch. John: That’s right, and once researchers identify the switch, perhaps they can turn off cancer or Alzheimer’s. Nora: People are also concerned that science will enable us to determine such qualities as intelligence and height. John: You know it’s going to happen—it’s just a matter of when. Nora: Imagine if everyone was a combination of Yao Ming and Albert Einstein. John: But what if they get it wrong, and you wind up with Yao Ming’s knowledge of nuclear physics and Albert Einstein’s height? Nora: All those religious groups would say that it served you right