1、Unit 2 Language 一、阅读理解 If you want to slow aging, you might want to eat less. This finding is good news-if you were a mouse. The researchers studied mice, not people. John Price and other researchers studied two groups of mice. One group was able to eat as much as it wanted. The researchers limited
2、what the mice in the other group ate. Their diet had 35 percent fewer calories than the first group of mice. Price says the mice with the diet restrictions were “more energetic and suffered fewer disease.” They were not just living longer but seemed to stay younger for a longer period of time. The r
3、esearchers found that fewer calories slow down a natural mechanism in cells called ribosomes. Price explains that ribosomes are responsible for making important proteins in the cells. But with fewer calories, they slow down. This gives the cells more time to repair themselves. The researchers say ri
4、bosomes use from 10 to 20 percent of the cells energy to make those proteins. Price wrote that “because of this, it is im practical to destroy an entire ribosome” when it starts to break down. However, “repairing individual parts of the ribosome on a regular basis enables ribosomes to continue produ
5、cing high quality proteins for longer than they would otherwise. This top quality production, in turn, keeps cells and the entire body functioning well.” Price said, “ribosome is a very complex machine, like a car.” They need “maintenance to replace the parts that wear out the fastest. When tires we
6、ar out,” he explained, “you dont throw the whole car away and buy a new one. It costs less to replace the old tires.” “Food,” he said, “isnt just material to be burned -its a signal that tells our body and cells how to respond.” Price said the findings help to explain how exactly our b odies age. An
7、d this may “help us make more educated decisions about what we eat.” 1.What can we know about the mice with limited calories from the study? A. They can keep healthy easily B. They need more energy to be active C. They can look younger than they are D. They will live a longer life like humans 2.What
8、 will happen to ribosomes if there are fewer calories? A. They will completely break down B. They make proteins in the cells slowly C. They will produce high quality proteins more D. They may need more time to repair themselves 3.Price explained the ribosomes role of repairing themselves by _. A. te
9、lling a story B. listing basic data C. making comparisons D. experimenting on mice 4.What does the text mainly deal with? A. Food decides how long you live B. Can you slow down your aging process? C. Eating less may help you live longer D. Should your diet be reduced for your health? 【文章大意】本文是一篇说明文。
10、通过研究实验发现：吃的少会使你长寿。 1.A 【解析】 细节理解题。根据第二段中 The researchers limited what the mice in the other group ate. Their diet had 35 percent fewer calories than the first group of mice.的提示可知他们能够很容易保持健康，故选 A。 2.B 【解析】 细节理解题。根据第四段中 The researchers found that fewer calories slow down a natural mechanism in cells c
11、alled ribosomes.的提示可知它们会在细胞中缓慢地产生蛋白质，故选 B。 4.C 【解析】 主旨 大意题。根据第一段首句 If you want to slow aging, you might want to eat less. This finding is good news 的提示可知这片名文章的主旨是吃的少会使你长寿，故选 C。 二、词汇练习 1. a lot of learning _ Don t _ the plastic vase too hard, or it might be broken.（压力；压） 2. _ some vinegar and water u
12、p and you will get a _.（混合；混合物） 3. make great _ to? His diligence _ to his great success eventually.（贡献；促成） 4. work as _ a public_ He first _as a waiter. （服务；招待；仆人） 5. Can you _ John from the two twins? make a _ （区别，差别；区分，辨别） 6. raise a public _ about? an issue _public safety （关心，忧虑；涉及） 7. I would l
13、ike to drink _ water. The water has been _. It is safe to drink it. （纯净的；使纯净） 8. Can you have _to the cave on the top of the hill? The cave on the top of the hill is _to you. （通道）（使用的）机会，权利 9. draw/ reach/ come to a _ I am sure that after reading the novel, you can _ that it is fantastic.(结论；得出结论 )
14、10. Please come to my home at your _ next time. The traffic here is very _. Many roads lead to the airport and railway station. （方便的；方便） 11. The plan is of _ use. Knowledge comes from _. （实际的，实用的；实践） 12. We dont judge a person only according to his or her _. Be more patient. He will _ sooner or late
15、r. （表明，外表；出现） 13. The firm is working on a new product in _ with several overseas partners. Some characters were made by _ two or more characters together. （组合，联合） 14. make a _ American English _ slightly from British English in pronunciation and spelling. What is _ from you is that he works harder
16、than you. （相异；不同的；不同） 15. _ discrimination People all over the world should live in harmony with each other regardless of _, gender and nationality.（种族） 16. A red sky at night _ fine weather the following day. There is no _ that he will turn up again.（显示；暗示） 17. practice _ English 18. 现今 ad 19. 击败 v
17、 20. 替换 v 21. 筹募 v 22. 过程 n 23. unique 24. 风俗 n 25. 举起 v 26. deed 27. 缺 点 ， 短 处ns_ 28. 养育 v 29. thus 30. version 31. 除 ? .之外 a_ _ 32. 由 ? . 组成 be _ _= _ _ 33. 母语 _ _ 34. poor eyesight 35. 代表；象征 _ _三、完形填空 It impressed me a lot.I never thought that little help will _1_ out to be the most satisfying th
18、ing I have ever done.He was tired， and _2_ to climb further.With a broad _3_， he asked if I could help him with some money.He was paralyzed(瘫痪 ) in both legs and was _4_ funds for some operation.He said that if operated successfully， he could _5_ a training guaranteeing him a job.I was full of _6_ a
19、nd even asked him to show his legs.I gave him the _7_ money.After a few days，he again came at my doorstep asking for more money for accommodation.This time I was more or less _8_ he was not cheating me.I gave him some and said， “This is all I have.” A year went by and I had moved to a(n) _9_ place.O
20、ne fine day I got a call from an unknown number.Caller called out his name but I didnt _10_ him.Then he said he was the very paralyzed person I helped a year ago. I asked him how he was doing.He said， “What sir, you recognize me not by my name but by my _11_ state.” “With your kind help I am now abl
21、e to _ 12_ on my legs without support.I was operated _13_.I am married to a beautiful lady and have a stable _14_.” I dont _15_ remember if I gave him my phone number._16_， what he said next was touching.He said he wanted to return my money so that I didnt feel cheated and would continue to help peo
22、ple _17_ in the future.I dont know whether he read my facial expression the day I helped him but tears were _18_ down my face.That day I promised him I would continue to help people as I saw a(n) _19_ small or big._20_ a lifechanged event of my life. 1 A.send B break C bring D turn 2 A.struggling B substituting C playing D walking 3 A.look B smile C view D whisper 4 A.finding B raising C seeking D earning 5 A.pretend B intend C attend D tend 6 A.interests B minds C worries D doubts 7 A.remaining B left C hiding D forgotten 8 A.informed
