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1、Passage oneOn June 26, 2000, two scientists, called Francis Collins and Craig Venter, told the world that they could now read the whole map of the human body: DNA. DNA is something that everybody has, and it tells the body what to do. DNA is the reason that we look like our mother and father, becaus
2、e we get some of their DNA to make our own. People have been trying to understand the human body for a long time. In 1860, Gregor Mendel discovered a special reason why we look the same as other people in our family. It is because of small things named genes in our body. In 1953, James Watson and Fr
3、ancis Crick made another discovery and found out that those small parts are real messages written in the DNA with a special language. In 1961, Marshall Nirenberg and Johann Matthaei found a message in DNA showing how DNA tells the cell (细胞) to build its parts. Scientists have now found all the words
4、 in the DNA map, but we still do not understand what they all do. By understanding what just one word means, we can help save more people from several illnesses. Most people hope that this will help make better medicine and help sick people. Other people worry that when people begin to know more wor
5、ds and find out lots of other information, we might use it in a wrong way, just to make people more attractive, or stop sick people from getting jobs. Man would have to meet a lot of trouble if DNA technic wasnt limited in use.1. When did we first know why we look like other people in our family?A.
6、In 1860. B. In 1953.C. In 1961. D. In 2000.2. What does the underlined word gene mean?A. The map of DNA.B. A special language. C. Small parts of DNA.D. DNA.3. What did the two scientists first discover in 1961?A. The map of DNA. B. A new illness.C. The language of DNA.D. A message of DNA.4. What can
7、 we do if we understand some words of the language inside the body?A. Make people get new jobs. B. Make medicine for illnesses. C. Make maps of human. D. Make people less attractive.5. What do people think about this work?A. It can cause good or bad resutls. B. It can cause only good results. C. It
8、can cause good results but wont work.D. It can cause only bad results.Passage twoI find it annoying and funny when I think about how we use protective or decorative wrappings (装饰性包装) in this country. When I come home from the supermarket and start to unpack, I am always shocked at the layers of wrap
9、pings we cover our food with. There is hardly anything we buy that doesnt come in at least two wrappings, and then several of them are gathered by the shop assistant and put into a small bag. Then several of the small bags are grouped together and put into a big bag. If you have several big bags wit
10、h small bags in them, they give you a cardboard box to put the packages-in-the-little-bags-in-the-big-bags in. A lot of things we buy wouldnt really need any protective wrapping at all. The skin of an orange protects an orange pretty well for most of its natural life, but we arent satisfied with wha
11、t nature has given it. We wrap them in plastic or put them in a net bag, and then in a paper bag. The orange inside the skin, inside the plastic which is in the paper bag, must wonder where it is. A box of biscuits often has waxed paper(蜡纸) next to the biscuits, a cardboard box holding the food and
12、then a decorative wrapping around it. A relative of ours bought a new sofa recently because she liked the fine leather (皮革) it was covered with. She liked it so much she didnt want it to get dirty, so she bought a cloth cover to put over it. We may never again see the leather shes protecting.6、Accor
13、ding to the author, the use of protective wrappings_.Acan be wasteful and unnecessary Bmakes everything look funnyCgives people more work to do Dis a practice against natural life7、How does the writer feel when he unpacks the food from the supermarket?ASurprised BInteressted Cfrightened Dexcited 8、w
14、hat can be the best protective wrapping for the orange?APlastic BA net bag Cits own skin DA paper bag 9、the underlined wordit in paragraph 5 refers to_Athe food Bthe waxed paper Cthe cardboard box Dthe decrative wrapping 10、what does the author think of his relative who bought a sofa?A、she should no
15、t buy a leather sofaB、she should not cover her sofa with a clothC、she should not allow the leather cover to get dirtyD、she should not forbid the visitors to see the leather.Passage threeTo us it seems so natural to put up an umbrella to keep the water off when it rains, But actually the umbrella was not invented as protection against the rain, Its first use was as a shade against the su
