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1、大学英语四级试练习卷一、阅读理解 阅读理解（一）Many people believe the glare from snow causes snowblindnenss. Yet, dark glasses or not , they find themselves suffering from headaches and watering eyes, and even snowblindness, when exposed to several hours of snow light”.The United States Army has now determined that glare
2、 from snow does not cause snowblindness in troops in a snow-covered country. Rather, a mans eyes frequently find nothing to foucs on in a broad expanse of barren snow-covered terrain. So his gaze continually shifts and jumps back and forth over the entire landscape in search of tsomething to look at
3、.Finding nothing, hour after hour, the eyes never sotp searching and the eyeballs become sore and the eye muscles ache. Nature offsets this irritation by producing more and fluid which covers the eyeball. The fluid coversthe eyeball in increasing quantity until vision blurs, then is obsured, and the
4、 result is total, even though temporary, snowblindness. Experiments led the Army to a simple method of overcoming this problem. Scouts ahead of a main body of troops are trained to shake snow from evergreen bushes, creating a dotted line as they cross completely snow-covered landscape, Even the scou
5、ts themselves throw lightweight , dark colored objects ahead on which they too can focus . The men following can then see something. Their gaze is arresteD. Their eyes focus on a bush and having found something to see,stop scouring the snow-blanketed lanscape. By focusing their attention on one obje
6、ct at a time, the men can cross the snow without becoming hopelessly snowblind or lost. In this way the problem of crossing a solid white terrain is overcome.1. To prevent headaches, watering eyes and blindness caused by the glare from snow, dark glasses are.A. indispensible B. useful C. ineffective
7、 D. available2. When the eyes are sore tears are produced to .A. clear the vision B. remedy snowblindnessC. ease the irritation D.loosen the muscles3. Snowblindness may be avoided by.A. concentrating to the solid white terrainB. searching for something to look at in snow-covered terrainC. providing
8、the eyes with something to foucs onD. covering the eyeballs with fluid4.The scouts shake snow from evergreen bushes in order to .A.bive the men behind something to seeB. beautify the landscapeC. warm themselves in the coldD.prevent the men behind from losing their way5. A suitable title for this wou
9、ld be.A. snowblindness and how to overcome itB. natrues cure for snowblindnessC.soldiers in the snowD. snow vision 阅读理解（二）Kite flying is the sport of sending up into the air, by means of the wind , a light frame covered with paper, plastic or cloth. The frame can be one of many different shapes and
10、is attached to a long string held in the hand or wound on a drum. Kites have a long history of practical application and many different types of kite have been debeloped to serve various purposes.The ancient Chinese used bird-kites to carry ropes across rivers and valleys. The current folding kite w
11、hich will dive excitingly is an improved type of such a kite. With its long flat body and single pair of bird-like wings, it looks just like a large bird in the air. The modern version is usually made of tissue-paper rather than the traditional silk. Man-lifting kites were developed in ancient times
12、, again by the Chinese, for getting information from walled cities and army camps. In fact , as recently as world 2 , German U-boats flew kites from their towers to lift people into the air to watch the lanD. These kites , which are no longer in existence, were made of light-weight cloth. They were
13、much larger and stronger than the Chinese ones. Their design, however, was simply thatof the cutter kite. Smaller in size, this type of kite is still very popular as a toy for children, being easy to make with a diamond-shaped frame, no wings and brown-paper covering. Box-kites are another type of k
14、ite found in toy shops today. The first box-kite, named for its box-like body, was developed in the nineteenth century to test theories of flight and this type of cotton-covered kite greatly assisted the success of early aeroplane. These kites are the ancestors of a heavier version of the box-kite,
15、which consists of two main sections, placed side by side. Developed for the peacetime purpose of fishing in strong sea wind, it is the only modern kite described which has practical value . A long-lasting plastic material has to be used for this kite, which carries fishing lines.1. The ancient Chine
16、se bird-kites were usually made of light frames covered with.A.silk B. paper C. cloth D. plastic2. The kites used by German U-boats in would war 2 for the military purpose were made of .A.brown paper B.plastic material C.light-weight cloth D.traditional silk3. The ancient Chinese man-lifting kites w
17、ere used.A.to carry ropes across rivers and valleys B.for the military purposeC. as toy for children D. for fishing in strong sea wind4. Which of the following statements is not ture?A. The frame of a kite is attached to long string held in the hand or wound on drum. B.The ancestor of the double box
18、-kite. C. The cutter kite has a diamond-shaped body but no wings. D.The current folding kite is developed to test theories of flight.5. The best title for this may be.A.The ancestors of modern kites B.The history of the Chinese kites C. different types and uses of kites D. the different between anci
19、ent and modern kites. 二、完型填空Dalton wondered why the heavier and lighter gases in the atmosphere did not separate as oil andwater do. He finally concluded that the constituent 1 must exist in the form of 2 particles or atoms andthat these 3 be completely mixed together in the 4 . This threw a new lig
20、ht in 5 laws of definiteproportions. It was 6 necessary to suppose that the atoms 7 combinesintossmall groups of uniform 8 andso form more complex substance; 9 the mystery of this law was 10 . Dalton suggested, for example, thatcarbon monoxide 11 formed bythe one with one 12 of atoms of carbon and o
21、xygen, 13 carbon dioxideresults from a single 14 of carbon uniting with two atoms 15 oxygen. Assuming this to be true, 16 thedefinite proportions of Prouts law (17 all chemical compounds the different constituents 18 enter inunvarying proportions) would naturally 19 therelative weights of the many 2
22、0 kinds of atoms.1. A. gases B. pieces C. things D. gas2. A. timely B.trimmed C.tiny D.topical3. A. ought B. could C. will D. must4. A. sky B. atmosphere C.oxygen D. environment5. A. various B. many C. the D. those6. A. only B. too C. that D. extremely7. A. should B. were C. get D. could8. A. constr
23、uct B.structure C.piece D. feature9. A. but B. also C. thus D. nevertheless10. A. solved B.discovered C. broked D.told11. A. must B. been C. were D. is12. A. putting B.pairing C. placing D.preparing13. A. while B. when C. therefore D. also14. A. piece B. type C. atom D. measure15. A. fromB.inC.ofD.f
24、or16. A. thenB.soC.byD.that17. A. fromB.inC.toD.for18. A. are B.wouldn t C. always D. never19. A. describe B. unit C. mix D. reveal20. A.different B. usual C. important D.chemical三、单词拼写1. Mr. Li moved to the seashore in his f（四十来岁）.2. H（听至U） the good news, we all jumped with joy.3. I changed into my
25、 sports shoes so that I could walk more c（舒 服）.4. W（星期三）is the fourth day of a week.5. Walking every day keep me f（健康）than before.参考答案：一、阅读理解：阅读理解（一）答案：CCCAA阅读理解（二）答案：ACBDC二、完型填空1 .【答案】A根据上文中的heavier and lighter gases可以确定，本空中应 填入“组成的气体“，即constituent gaseso2 .【答案】C根据句子意思判断,句中的词意为微粒的意思，选项C.tiny合 乎题意。3
26、 .【答案】D情态动词must在这里是“必定、必须”的意思。4 .【答案】B sky意为“天空”，atmosphere意为“大气”，oxygen意为“氧气”，environment意为“环境”，只有B项正确。5 .【答案】C这帮助解释了大气组成气体的比例确定原理。因为是特指这一原 理，用定冠词the。6 .【答案】A only necessary的意思是“仅仅是必要”。故A正确。7 .【答案】D根据句子意思判断，could是“能够”的意思。8 .【答案】B根据句子意思判断，这里需要“结构”这个词，而B合乎题意。9 .答案Cbut, nevertheless表示转折意为“但是”，“然而；thus
27、意为“因此“，如 There has been no rain. Thus, the crops are likely to suffer.一直没有下雨，因此庄稼可能会受害。这里与上文有因果关系，故应选Co10 .【答案】A solve 相当于 find a solution or an answer to,意为“解决”、“押车开”，如：solve a problem (a puzzle, a mystery) ； discover 相当于 find something existing but not known before,意为“发现，如:discover a place (a fact
28、, the truth) o因此应选 Ao11 .【答案】D因为是表一般规律，又是单数，所以用is这个词。12 .【答案】B Pair这里是“匹配，配成双”的意思。13 .【答案】A while 表示对比。如：Some substances are soluble, while others are not.一些物质是可 溶的，而另一些物质是不可溶的。【答案】C根据句子意思判断，atom正确。【答案】C of表示“含量，分量”。【答案】A then的意思是next, after thato【答案】D for的意思是“对于，就而言【答案】C根据句子意思判断。19 .【答案】B describe意为“描述；unite意为“结合，合并；mix意 为“（不同的东西）混合在一起“，如：mix flour and water； reveal意为“揭 露，揭示”。20 .【答案】A根据句子意思判断.三、单词拼写1. forties2. hearing3. comfortably4. Wednesday5. fitter