1、Unit 3 ComputersSection A Warming up, Pre-reading, Reading &Comprehending建议用时满分实际用时得分错题档案45分钟60分I. 单词拼写（共10空；每空1分，满分10分） 根据首字母或汉语提示，写出符合句意的单词及其正确形式。1. I (实在) cant do such stupid behaviour. 2. Now students are in need of good (科技的) books badly. 3. Use your (聪明才智), and youre sure to achieve something.
2、 4. Im afraid that your way of doing the job is (完全地) wrong. 5. The new buildings have changed the (特点) of the village.6. The railway (信号) showed that the train could pass.7. I have c _ _ that there are 10, 080 minutes in a week. 8. The army officers led a r _ _ against the king. 9. P _ _, I think h
3、e is dishonest, but many people trust him.10. The principals a _ _ at the party didnt seem to be very welcome.II. 根据汉语提示完成句子（共10小题；每小题2分，满分20分）1. The boy worked hard， （结果）, he passed the examnition.2. Sickness sometimes (是由于) eating too much.3.The discussion between the two sides has lasted for half
4、 a month,but (毫无结果).4.I told you before (别碰我的东西).5.There isnt enough room for us, (更不用说)any guests.6. She asked to （不被打扰）.7. Andrew decided to (单独干)and start his own business.8The child by Grandma Wang all these years.(care)这些年这个孩子都是由王妈妈照看。9. By the time I was sixteen，my dream .(realize)到我十六岁的时候，我的梦
5、想实现了。10Anyhow，my goal is _a life of high quality.(provide)无论如何，我的目标是给人类提供高质量的生活。III. 单项填空（共10小题；每小题2分，满分20分）1.When different cultures,we often pay attention only to the differences without noticing the similarities.A. compared B. being comparedC. comparing D.having compared2. with the size of the wh
6、ole earth,the biggest ocean doesnt seem big at all.A. Compare B. When comparingC.Comparing D.When compared3.John thinks it wont be long he is ready for his new job.A. when B. afterC. before D. since4.The girl had hardly rung the bell the door was opened suddenly, and her friend rushed out to greet h
7、er.A. before B.untilC.as D.since5.I travel to the Binhai New Area by light railway every day, do many business men who live in downtown Tianjin. A.as B.whichC.when D.though 6.Who should be responsible for the accident? The boss, not the workers. They just carried out the order . A.as told B. as are
8、toldC.as telling D.as they told7.The Great Wall is tourist attraction that millions of people pour in every year.A.so a well-known B.a so well-knownC.such well-known a D.such a well-known8.Roses need special care they can live through winter.A.because B.so thatC.even if D.as9.There is not much time
9、left, but we must get there on time.A.somehow B.somewhatC.however D.anyway10.We dont have to keep these old chairs any more. They are falling apart.A.Anyway B.ThereforeC.However D.OtherwiseIV. 阅读理解(共5小题；每小题2分，满分10分)What will power your house in the future？Nuclear，wind，or solar power？According to sci
10、entists at the Massachusetts Institute of Technology(MIT)in the US，it might be leavesbut artificial(人造的)ones.Natural leaves are able to change sunlight and water into energy.It is known as photosynthesis(光合作用)Now researchers have found a way to imitate this seemingly simple process.The artificial le
11、af developed by Daniel Nocera and his colleagues at MIT can be seen as a special silicon chip with catalysts(催化剂)Similar to natural leaves，it can split water into hydrogen and oxygen when put into a bucket of water.The hydrogen and oxygen gases are then stored in a fuel cell，which uses those two mat
12、erials to produce electricity，located either on top of a house or beside the house.Though the leaf is only about the shape of a poker card，scientists claimed that it is promising to be an inexpensive source of electricity in developing countries.“One can imagine villages in India and Africa not long
13、 from now purchasing an affordable basic power system based on this technology，”saidefficiently.Nocera at a conference of the American Chemical Society.The artificial leaf is not a new idea.The first artificial leaf was invented in 1997 but was too expensive and unstable for practical use.The new le
14、af，by contrast，is made of cheap materials，easy to use and highly stable.In laboratory studies，Nocera showed that an artificial leaf prototype(原型)could operate continuously for at least 45 hours without a drop in activity.The wonderful improvements come from Noceras recent discovery of several powerf
15、ul，new and inexpensive catalysts.These catalysts make the energy transformation inside the leaf more efficient with water and sunlight. Right now，the new leaf is about 10 times more efficient at carrying out photosynthesis than a natural one. Besides，the device can run in whatever water is available
16、；that is, it doesnt need pure water. This is important for some countries that dont have access to pure water.With the goal to “make each home its own power station” and “give energy to the poor”，scientists believe that the new technology could be widely used in developing countries，especially in In
17、dia and rural China.1Which of the following orders correctly shows how the artificial leaf is used to produce electricity?a.artificial leaves split water into hydrogen and oxygenb.the hydrogen and oxygen gases are stored in a fuel cellc.the artificial leaves are put in waterd.the fuel cell uses hydr
18、ogen and oxygen to produce electricityA.c，b，a，d. B.c，a，b，d.C.b，c，a，d. D.c， a，d，b.2Which of the following statements about new artificial leaves is NOT WRONG according to the article?A.They are inexpensive but unstable.B.They are as efficient at carrying out photosynthesis as natural leaves.C.They ca
19、n work only in pure water.D.They need several catalysts to help them work3The purpose of the scientists at MIT in developingthe new artificial leaf is to .A.build up more power stations in the worldB.provide cheaper energy for developing countriesC.offer people in developing countries access to pure
20、 waterD.gain a deeper understanding of the photosynthesis process4The main idea of this passage is .A.an introduction to the history of artificial leavesB.an invention copying photosynthesisC.giving energy to the poorD.a mixture of water power and solar energy5The underlined word “imitate” in Paragr
21、aph 2 can be replaced by “ ”A.produce B.hold C.prevent D.copy答案与解析I. 1. simply 2. technological 3. intelligence 4. Totally 5. character 6. signal 7.calculated 8.Revolution 9. Personally 10. appearanceII. 1.As a result 2.results from3.without result 4.leave my things alone5.let alone 6.be left alone7
22、.go it alone 8has been taken care of 9had been realized10to provide human beings withIII. 1.C we 与compare之间为逻辑上的主谓关系，故用现在分词comparing作状语表示主动含义。2.D compare与句子主语the biggest ocean之间为逻辑上的动宾关系，故用when compared 作状语，表示被动含义。3.C 句意：约翰认为他不久就会为他的新工作准备好。It wont be long before是一个常用的句式，意思是“不久就会”。4.A 句意：这个女孩刚一按门铃，门就
23、突然开了，她的朋友冲出去问候她。before在之前，还没有；until知道才；as当时候；since自从以来。根据句意选择A项。题干中hardlybefore实际上是固定句式，意思是：“刚就”，相当于hardlywhen。5.A as 引导比较或方式状语从句时，一般采用正常语序，但在正式语体里，as从句有时也采用倒装语序，即as I do或as I do。句意：像住在天津市区的许多商务人士一样。6.A as told是方式状语从句as they were told的省略形式。7.D 在so/suchthat结构中，so可以用“so+adj.+a(an)+单数名词”结构，而such则用“such
24、+a(n)+adj.+单数名词”结构。8.B so that在该句中引导目的状语从句，意为“以便”“为了”。9.D 句意：时间不多了，但无论如何我们必须按时赶到那儿。anyway在该句中意为“无论如何”。10.A anyway在该句中的意思是“反正”。IV. 【文意概说】 本文是一篇科普文。文章介绍了科学家利用人造树叶仿效光合作用进行发电这一新发明。1.B细节理解题。文章的第三段提到人造树叶发电的过程：先把它放在一桶水里，然后树叶将水分解为氢气和氧气，而氢气和氧气被存储于燃料电池里，随后电池利用氢气和氧气的反应发电。2.D细节理解题。根据文章第六段中的“The wonderful improvements come from Noceras recent discovery of several powerful，new and inexpensive catalysts.”可知，人造树叶发电能够更有效率的关键在于催化剂。3.B推理判断题。根据最后一段可知，人造树叶发电这一技术可以帮助发展中国家获得便宜的能源。4.B主旨大意题。综观全文可知，本文主要讲述了人造树叶模拟光合作用发电这一新发明5.D词义猜测题。画线部分的前文介绍了什么是光合作用，后文介绍了利用人造树叶效仿这种光合作用进行发电的内容，所以该词的含义应该是“仿效”，故D项是最佳答案。