Unit 2课时跟踪练(一)Warming Up & ReadingPre-reading.阅读理解AAuthors Kyle Kurpinski and Terry DJohnson pretty much have me convinced that human cloning is quite possible and is a future certainty. Kurpinski and Johnson are both bioengineering experts; unlike similar scientists you have seen in the movies, they both have a sense of humor. What surprises me is that Kurpinski and Johnson are able to take something as complicated as DNA and make it understandable.The book How to Defeat Your Own Clone teaches us what is now known as DNAencoded (编码), how that happens, and why people with similar DNA dont look or act the same. The book not only helps us get a basic understanding of what DNA and its purpose are, but also explains cloning and stem cell (干细胞) research. It occurs to me that a lot of people who are against stem cell research dont know what they are protesting about. The authors provide a history of cloning, as well as information about stem cells.The real fun starts when the authors attack various myths about cloning. Obviously, too many people have been watching too many bad movies and television programs. Remember theyre just fictional stories. If, somehow, scientists manage to clone you. Twenty years from now your clone isnt going to kill you. Among the myths explored and exploded are that a clone will know everything you know and will act as you do, that heads which are cut off can be kept alive, and that a clone has no belly button (肚脐). Many of the myths are ridiculous but many people believe them.Kurpinski and Johnson also detail some bioimprovements “that really work”. You see, genes can be controlled to help you sleep better and become smarter, healthier, and taller. Well . not exactly you, but future generations.If you do wind up in a battle with your own clone, who will be considerably younger than you, remember that it is not you and that it doesnt know what you know.1Many bioengineering experts in movies are _.AhumorousBwealthyCserious Dcrazy解析：选C推理判断题。从第一段的“unlike similar scientists you have seen in the movies, they both have a sense of humor”可知电影中的生物工程学家一般都是没有幽默感的。2Which of the following things are in the book How to Defeat Your Own Clone?aWhat DNA and its purpose are.bWho is against cloning.cThe history of cloning.dThe myths about cloning.eThe disadvantages of cloning.Aa，b，e Ba，c，dCb，d，e Db，c，d解析：选B细节理解题。从第二段的“The book not only helps us get a basic understanding of what DNA and its purpose are . The authors provide a history of cloning .”及第三段的“The real fun starts when the authors attack various myths about cloning.”可知答案。3We can learn from the passage that biotechnology _.Ahas been banned in many countries around the worldBis being used to improve ones intelligence right nowCcan help improve the physical condition of future generationsDis sure to cure any disease in the near future解析：选C推理判断题。从第四段的“genes can be controlled to help you sleep better and become smarter, healthier, and taller. Well . not exactly you, but future generations”可知C项正确。4According to the passage, a clone of you _.Awill want to kill youBknows whatever you knowChas no belly buttonDwill be younger than you解析：选D细节理解题。从最后一段的“who will be considerably younger than you”可知D项正确。BMekong River Cruise TourDay 1: Saigon Cai Be My Tho07：00 AM: Gather round at the hotel in Saigon and then go to Cai Be.10：00 AM: Arrive at Cai Be and then explore the lively Cai Be floating market in the morning by motorboat. Visit a handicraft village of the local people on foot and taste various tropical fruits. Continue by boat to Mekong Lodge an ecoresort Mekong Lodge including 29 private pretty houses and River View Restaurant, stretched in an area of more than 10,000 m2. It lies just beside the Tien River. Visit Mekong Lodge and walk around this area to see the local people who are doing daily activities and preparing lunch for their families. Lunch is served on board.After lunch, leave Cai Be for My Tho on Ngu Hiep Island.02：30 PM: Arrive at Ngu Hiep Island. Enjoy a biking or walking tour on this island seeing the local peoples daily life. Cruise down the Mekong River while enjoying the beautiful scenery and enjoy the beautiful sunset on the Tien River. Dinner and overnight on board between Ngu Hiep Island and My Tho.Day 2: My Tho SaigonIn the morning, the noise of the boats wakes you up. Watch the daily life of the local people who live on both sides of the Mekong River, and have breakfast on board. Continue cruising to My Tho. After breakfast, check out luggage to a small motorboat to explore one of the islands in My Tho. The guests can walk through the island, trying native fruits, viewing local handicraft production and meeting the local people. Drive to a restaurant in My Tho. Lunch there.After lunch, visit Vinh Trang Pagoda. The monks here provide a home to orphans,