1、大学英语四级模拟试卷 337及答案与解析 一、 Part I Writing (30 minutes) 1 For this part, you are allowed 30 minutes to write a composition on campus love. You should write at least 120 words following the outline given below in Chinese: 1. 对于大学在校本科生谈恋爱的现象，不同的人有不同的看法 。 2你的观点。 二、 Part II Reading Comprehension (Skimming a
2、nd Scanning) (15 minutes) Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions attached to the passage. For questions 1-7, mark： Y (for YES) if the statement agrees with the information given in the passage; N (for NO) if the statement contradict
3、s the information given in the passage; NG (for NOT GIVEN) if the information is not given in the passage. 1 Bird Flu The H5N1 strain of influenza(H5N1 类禽流感 )-often referred to as bird flu-was first known to have spread from chickens to humans in 1997. Since 2004 it has attacked Asian poultry farms
4、(家禽饲养所 ), and had a 7% death rate in the first 70 people who were known to have been infected. Health authorities fear this strain, or its descendents (变种 ), could cause a fatal new flu with the potential to kill billions. Flu has been a regular disaster of humanity for thousands of years. The flu v
5、iruses are a large family, each possessing a mere 10 genes encoded in RNA (核糖核酸 ). All of the 16 known groups come first from water birds, especially ducks and gulls (鸥 ). The virus is well adapted to their immune systems, and does not usually make them very sick. This leaves the animals free to mov
6、e around and spread the virus. Violent virus But every now and then a bird flu virus is transmitted to all animal whose immune system the virus is not adapted to. If the bird flu from a forest bird spreads to chickens, it causes an average disease but can readily change to a more severe strain. Just
7、 such a strain of HSN1 flu has hit large chicken farms in East Asia. The situation is serious because, in 1997, scientists found for the first time that H5 flu is capable of infecting humans. It was found in 18 people, six of whom died. All the poultry in Hong Kong were destroyed to stop the threat.
8、 But it continued to circulate, especially in China. There were further human cases in China in 2003. Then in early 2004 Vietnam (越南 ) reported widespread poultry outbreaks and some human cases. Cambodia (柬埔寨 ) and Thailand denied the outbreaks in the beginning but admitted the fact later. So did Ch
9、ina. A mass poultry selection stopped the outbreaks by March 2004, by which time 23 people had died. But the virus went on, most probably in ducks. But scientists think that we should not blame its persistence and spread in the region all on wild birds. The outbreaks started again in summer 2004, an
10、d by mid-April 2005 had caused a total of 51 human deaths, all in Thailand and Vietnam. Making the jump The two or three flu virus families that have made the jump to humans mostly cause slight disease, because they have adapted to our immune systems. A yearly winter flu suffers most of the world. B
11、ut it is not totally benign (良性的 ). About 700,000 people around the world die of it each year, mainly the very old, very young and the weak. Common flu vaccines(疫苗 ) are increasing in popularity, although flu evolves so fast that we need new flu vaccines every year. In 2004 an unexpected shortage of
12、 vaccine in the US indicated the weakness of the vaccine supply, which is produced by very few manufacturers. As New Scientist predicted, it took great efforts to limit available supplies to those most at risk of serious illness, preventing extra deaths. But flu is most deadly when it first makes th
13、e jump to people because the virus had no opportunity to adapt itself to our immune systems. H5N1 has continued to infect humans as the outbreak in poultry has increased, with an apparently high death rate. It has so far been hard to infect human beings, and has not spread readily between people. If
14、 this viral strain should acquire that ability of attacking us, it could become a lethal pandemic (流行性疾病 )-the name for a wide-spread disease that spreads worldwide. Deadly widespread In 1918, a virulent (有毒菌株 ) flu strain appeared in humans and killed 50 million people within a few months. There ha
15、ve also been two less catastrophic(悲惨的 ) pandemics. The so-called “Asian“ flu of 1957 caused between one and four million deaths, while 1968s “Hong Kong“ flu with about half the estimated deadliness of the Asian flu-caused one to two million deaths. Both of these were human flu viruses which had rec
16、ombined with bird flu viruses. The 1957 strain was nearly released by accident in 2005. Virologists generally agree that we are due for another pandemic. So they are very worried about H5N1, because-like the 1918 event-it seems to be evolving to become more deadly to mammals(哺乳动物 ). This is largely
17、in China and, possibly, as New Scientist revealed, in vaccinated chickens. It could evolve into a potential pandemic that way, or by recombining with human flu, especially as most people in the Far East are not vaccinated against ordinary flu strains. Mitigation (缓解 ) measures Fortunately we can mak
18、e vaccines for the H5NI strain, although our ability to get them tested and manufactured in time for a pandemic is in doubt. Once an effective vaccine is produced, yet another defense would be against it swiftly. If either aspect of that process should fail, the only backup would be antiviral (抗病毒药
19、) drugs. A few new ones are on the way, but existing drugs are in short supply. If the flu virus changes genetically, it may become less deadly. However, there is no reason to think this will happen, and a highly infectious virus with a 70% death rate is a terrifying prospect, particularly given the
20、 speed of modern international travel.There is also a chance that it could evolve into a completely new disease, which we could fail to examine before it spreads. Even if H5 does not lead to the next pandemic, its cousins H7 and H9 could. H7 is present in the same region and also infected large numb
21、ers of Dutch people in an outbreak in 2003. Although it caused few symptoms (症状 ), and only one death, it is possible that such a poultry virus could cross-breed with a human flu, making it even more dangerous. Some scientists are not willing to wait and see. They are trying to breed contagiousness
22、(传染性 ) into H5N1 to see if it is likely to happen. Others are breeding replicas (复制品 ) of the 1918 virus-from samples recovered from victims-to see just what made it so deadly. But some feel that those experiments, because of the potential for escape from the lab, put us at as much risk as the natur
23、al evolution of the virus. Debora Mackenzie, 6 May 2005 2 Cancer is a potential threat to human beings. （ A） Y （ B） N （ C） NG 3 The virus of flu is well adapted to immune systems of water birds, and does not usually make them very sick. （ A） Y （ B） N （ C） NG 4 Scientists think that we should blame t
24、he virus of flu all on wild birds. （ A） Y （ B） N （ C） NG 5 So far H5N1 can easily infect human beings, and spreads readily between people. （ A） Y （ B） N （ C） NG 6 H5N1 could evolve into a potential pandemic that way, or by recombining with human flu. （ A） Y （ B） N （ C） NG 7 Fortunately we can make v
25、accines for the H5N1 strain, and get them tested and manufactured in time for a pandemic. （ A） Y （ B） N （ C） NG 8 It is as risky as the natural evolution of the virus that the scientists breed contagiousness into H5N1 to see if it is likely to happen. （ A） Y （ B） N （ C） NG 9 The outbreak of the stra
26、in of H5N1 flu in summer 2004, and by mid-April 2005, had killed _ people. 10 1968s “Hong Kong“ flu-with about half the estimated deadliness of the Asian flu-caused _ deaths. 11 If the measure of vaccine should fail, the only backup would be _. Section A Directions: In this section, you will hear 8
27、short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked
28、 A, B, C and D, and decide which is the best answer. （ A） Hes a secretary. （ B） Hes a novelist. （ C） Hes a newspaperman. （ D） Hes a businessman. （ A） A grocery store. （ B） An electrical shop. （ C） A gift shop. （ D） A bank. （ A） Because its bad for her health. （ B） Because its a bad example to the ch
29、ildren. （ C） Because it makes him smell. （ D） Because it makes him cough. （ A） She had lost the book. （ B） He had brought the wrong book. （ C） She had forgotten the book. （ D） He wasnt able to bring the book. （ A） She agreed. （ B） She was impatient. （ C） She disagreed. （ D） She was worried. （ A） 25.
30、 （ B） 15. （ C） 35. （ D） 20. （ A） To get some buttons. （ B） To get some thread. （ C） Because they need to buy a needle. （ D） Because they want to sew on a button. （ A） $ 20.5. （ B） $ 19.5. （ C） $ 18.5. （ D） $ 14. （ A） Go to a small university in the state. （ B） Go to a small university out of the sta
31、te. （ C） Go to a big university in the state. （ D） Go to a big university out of the state. （ A） He will apply for a scholarship and his parents will help him. （ B） He has applied for a scholarship. （ C） His parents will help him. （ D） B & （ A） She has a lot of friends there. （ B） The school has a g
32、ood teacher preparation program. （ C） They have a great basketball team. （ D） There isnt a lot of partying. （ A） He had a meal with a general manage. （ B） He applied for a new job. （ C） He moved into a new apartment. （ D） He bought some paintings. （ A） One. （ B） Two. （ C） Three. （ D） Four. （ A） Bori
33、ng. （ B） Interesting. （ C） Easy. （ D） Difficult. （ A） Excited. （ B） Depressed. （ C） Nervous. （ D） Scared. Section B Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. Afte
34、r you hear a question, you must choose the best answer from the four choices marked A, B, C and D. （ A） They are very busy. （ B） They feel tired and want to go to bed early. （ C） The speakers house has no electricity. （ D） The speaker doesnt have a television set. （ A） They stare at the walls. （ B）
35、They collect stamps. （ C） They attend evening classes. （ D） They do whatever they are interested in. （ A） They feel delighted. （ B） They feel relaxed. （ C） They feel lost. （ D） They feel confident. （ A） Alcohol helps develop peoples intelligence. （ B） Heavy drinking is not necessarily harmful to one
36、s health. （ C） Controlled drinking helps people keep their wits as they age. （ D） Drinking, even moderately, may harm ones health. （ A） Worried. （ B） Pleased. （ C） Surprised. （ D） Unconcerned. （ A） At a conference. （ B） In a newspaper. （ C） On television. （ D） In a journal. （ A） As a French translat
37、or while stationed in Paris. （ B） While serving in the army. （ C） As a dramatist in the American theater. （ D） His college life. （ A） Three years. （ B） Almost four years. （ C） Two years. （ D） Three years and one semester. （ A） At least three. （ B） Four. （ C） Only two foreign languages. （ D） At least
38、 two. （ A） To assign a person poorly. （ B） To assign language translators. （ C） To assign a person in their best language. （ D） To assign a person a job that is not consistent with his best qualifications. Section C Directions: In this section, you will hear a passage three times. When the passage i
39、s read for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard. For blanks numbered from 44 to 46 you are required to fill in the missing
40、 information. For these blanks, you can either use the exact words you have just heard or write down the 36 If you were to stop people in the street and ask them to name a ship that had been sunk, it is likely that nearly all of them would say the Titanic. For the【 B1】 _of the Titanic was, if not th
41、e most【 B2】 _, certainly the most famous sea disaster in the history of ocean【 B3】 _. The Titanic was built as a luxury liner, intended to be the fastest in the world, and a great deal of publicity had【 B4】 _it. The last point probably explains why so many important people from all【 B5】 _of life wer
42、e on the boat when it went down. The Titanic was on its maiden【 B6】 _to America in 1921 when it【 B7】 _an iceberg and sunk. Of its 2,200 passengers, more than two-third were drowned. Because the Titanic was thought to be【 B8】 _unsinkable, no one was prepared for the tragedy.【 B9】 _. There was a sever
43、e shortage of lifeboats and those that were launched were still half-empty. The one point of calm was to be found in the ballroom where the band carried on playing right to the very end.【 B10】 _. In addition, one ship was only ten miles away, but did not receive the distress call. One good thing did
44、, however, result from the disaster.【 B11】 _. 37 【 B1】 38 【 B2】 39 【 B3】 40 【 B4】 41 【 B5】 42 【 B6】 43 【 B7】 44 【 B8】 45 【 B9】 46 【 B10】 47 【 B11】 Section A Directions: In this section, there is a short passage with 5 questions or incomplete statements. Read the passage carefully. Then answer the qu
45、estions or complete the statements in the fewest possible words. 47 For centuries men dreamed of achieving vertical flight. In 400 AD Chinese children played with a fanlike toy that spun upwards and fell back to earth as rotation ceased. Leonardo da Vinci conceived the first mechanical apparatus, ca
46、lled a “Helix“, which could carry a man straight up, but this was only a design and was never tested. The ancient dream was finally realized in 1940 when a Russian engineer piloted a strange-looking craft of steel tubing with a rotating fan on top. It rose awkwardly and vertically into the air from
47、a standing start, hovered a few feet above the ground, went sideways and backwards, and then settled back to earth. That vehicle was called a helicopter. Imaginations were fired. Men dreamed of going to work in their own personal helicopters. People anticipated that vertical flight transports would
48、carry millions of passengers as do the airlines of today. Such fantastic expectations were not fulfilled. The helicopter has now become an extremely useful machine. It excels in military missions, carrying troops, guns and strategic instruments where other aircraft cannot go. Corporations use them a
49、s airborne offices, many metropolitan areas use them in police work, construction and logging companies employ them in various advantageous ways, engineers use them for site selection and surveying, and oil companies use them as the best way to make offshore and remote work stations accessible to crews and supplies. Any urgent mission to a hard to-get-to place is a likely task for a helicopter. Among their other multitude of uses: deliver people across town, fly
