1、大学英语六级模拟试卷 818及答案与解析 一、 Part I Writing (30 minutes) 1 For this part, you are allowed 30 minutes to write a short essay entitled About Keeping Indoors. You should write at least 150 words following the outline given below: 1目前很多年轻人大部分时间喜欢 “宅 ”在家里，很少外出活动 2对这种做法有人表示支持，也有人并不赞成 3我的观点 About Keeping Indoor
2、s 二、 Part II Reading Comprehension (Skimming and 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 1-4, mark： Y (for YES) if the statement agrees with the information given in the p
3、assage; N (for NO) if the statement contradicts the information given in the passage; NG (for NOT GIVEN) if the information is not given in the passage. 1 How Safe Is Your Cell Phone? It takes a little extra work to get in touch with Andrea Boland. The Maine state representative answers e-mails and
4、lists her business and home phone numbers on the Web. But unlike many politicians surgically attached to their BlackBerrys, she keeps her cell switched off unless shes expecting a call. And if she has her way, everyone in Maineand perhaps, eventually, the rest of the USwill similarly think twice bef
5、ore jabbering (急促含糊地说 )away on their mobiles. In March, Maines legislature will begin debating a bill she submitted that would require manufacturers to put a warning label on every cell phone sold in the state declaring, “This device emits electromagnetic radiation, exposure to which may cause brain
6、 cancer.“ Her warning would continue: “Users, especially children and pregnant women, should keep this device away from the head and body.“ For those of you now eyeing your cell phones suspiciously, its worth noting that both the National Cancer Institute and the World Health Organization say there
7、isnt evidence to support the assertion that cell phones are a public-health threat. But a number of scientists are worried that there has been a dangerous rush to declare cell phones safe, using studies they feel are inadequate and too often weighted toward the wireless industrys interests. An analy
8、sis published by University of Washington neurologist Henry Lai determined that far more independent studies than industry-funded studies have found at least some type of biological effect from cell-phone exposure. Several countriesincluding Finland, Israel and Francehave issued guidelines for cell-
9、phone use. And San Francisco Mayor Gavin Newsom, who began researching the issue when his wife was expecting their first child, is hoping his city will adopt legislation that would have manufacturers print radiation information on cell-phone packaging and manuals and require retailers to display the
10、 data on the sales floor. With 270 million Americans and 4 billion people around the world using cell phonesand more signing up every daya strong link between mobiles and cancer could have major public-health implications. As cell phones make and take calls, they emit low-level radio-frequency (RF)r
11、adiation. Stronger than FM radio signals, these RF waves are still a billionth the intensity of known carcinogenic (会致癌的 )radiation like X-rays. The wireless industry contends that RF radiation lacks the strength to alter molecules in the human bodys the Federal Communications Commission maximum for
12、 cell-phone-signal exposure is intended to prevent RF radiation from heating tissue to the point that cells are damaged. Cell-phone RF radiations “effect on the body, at least at this time, appears to be insufficient to produce genetic damage typically associated with developing cancer,“ Dr. Robert
13、Hoover, director of the National Cancer Institutes Epidemiology and Biostatistics Program, testified at a 2008 congressional hearing. But the body of research is far from conclusive. In 1995, Lai co-wrote a study showing that a single two-hour exposure of RF radiationat levels considered safe by the
14、 US standardsproduced the sort of genetic damage in rats brain cells that can lead to cancer. Though subsequent researchersoften funded in part by the wireless industryfailed to replicate Lais results, a 2004 European Union-funded study reported similar findings. Dariusz Leszczynski, a research prof
15、essor at Finlands Radiation and Nuclear Safety Authority in Helsinki, has done studies indicating that RF radiation may create a stress reaction in the cells that line blood vessels, leading to a dangerous damage in the blood-brain barrier. “Mobile-phone radiation may be able to indirectly hurt cell
16、s, perhaps by interfering with their ability to repair normal DNA damage,“ he says. “Given the scientific uncertainty, its premature to say the use of cell phones is safe.“ If RF radiation increases the chances of developing brain cancer, it should show up in long-term studies of cell-phone users. B
17、ut many epidemiological studies have found no clear connection, including a 2007 Danish Cancer Society study of 421 000 cell-phone users, which led many in the media to conclude that mobiles are harmless. To date, “ peer-reviewed scientific evidence has overwhelmingly indicated that wireless devices
18、 do not pose a risk,“ says John Walls, a spokesman for CTIA, a global wireless association. There are problems with many of these studies, however. For starters, the Danish onewhich reviewed the medical records of people who had signed up for cell phones from 1982 to 1995didnt include all the busine
19、ss users, who were among the earliest adopters and most intensive users, because they were not billed directly. Also, the study looked only at tumors that were diagnosed by 2002not long after daily use of cell phones became widespread. Brain cancers can take several decades to develop, so it might b
20、e many years before a measurable bump in cancer rates shows up. “The latency period we have is far too short,“ says Dr. Siegal Sadetzki, a cancer researcher at Israels Gertner Institute whose epidemiological studies have found some connections between cell-phone use and salivary-gland (唾液腺 )tumors.
21、“And today, people are using the phone much more heavily.“ Sadetzki served as Israels principal investigator in the Interphone study, which was conducted over the past several years by 13 countries, most of them European. The Interphone results initially were to be published in 2006, but the final r
22、eport has been postponed repeatedly, and the study investigators are reportedly deeply divided. In the US, which isnt one of the Interphone countries, the National Toxicology Program is launching studies of the health effects of cell phones. But peer-reviewed results wont be available until at least
23、 2014. Thats a long time to wait for definitive data. The good news is that there are easy ways for those concerned about RF radiation to cut down on exposure. Using your cell phones speaker or connecting a wired headsetwhile keeping the handset away from your bodydrastically reduces RF exposure. (B
24、luetooth headsets help too, but they still emit some radiation.)And given the potentially more serious risks for children, who have thinner skulls than adults, parents might want to wait before handing teens their first phoneor at least ensure they use it mostly for texting. Meanwhile, a start-up, P
25、ong Research, is selling cell-phone cases that significantly reduce radiation exposure by channeling waves away from the head. “I think its best to avoid as much of the risk as possible until the verdict is in,“ says Alfred Wong, Pongs chief scientist and a professor emeritus of physics at UCLA. Tha
26、ts exactly what Boland and other advocates of warning labels are arguing. Its true that cell-phone use has yet to be linked to cancer risk. “Scientifically speaking, we dont have the proof yet,“ says Sadetzki. “But as a public-health concern, Im saying we definitely should adopt precautions.“ 2 It i
27、s not very convenient to communicate with Andrea Boland because_. （ A） her phone numbers are not published to the public （ B） she has no e-mail or cell phone for communication （ C） she keeps her cell phone off most of the time （ D） she is too attached to the functions of her cell phone 3 If Andreas
28、bill is passed, it is possible that_. （ A） cell phone production will be banned in Maine （ B） warning labels will be put on cell phones （ C） a new fund will be established for brain cancer （ D） children will have access to cell phones 4 According to Henry Lai, the researches on cell phones_. （ A） sh
29、ow that cell phones are totally harmless to health （ B） are absolutely funded by the wireless industry （ C） demonstrate that cell phones can directly cause cancer （ D） have different results from different studies 5 The RF waves are a kind of radiation that is_. （ A） strong enough to cause cancers （
30、 B） weaker than FM radio signals （ C） slightly weaker than X-rays （ D） at a relatively low level 6 What does Dr. Robert Hoovers announcement imply? （ A） RF radiation is associated with the development of cancer. （ B） RF radiation has been definitely determined as harmless. （ C） Theres no efficient e
31、vidence to show the risks of RF radiation. （ D） Cell phones should be banned until the effects of RF radiation are clear. 7 Dariusz Leszczynskis studies have shown that_. （ A） cell phones may lead to some damage to the cells （ B） RF radiation is able to hurt cells directly （ C） the blood vessels can
32、 be seriously damaged by cell phones （ D） it is appropriate to say that it is safe to use cell phones 8 Why was the Danish Cancer Society study on cell phones not accurate? （ A） Because it only investigated the earliest adopters. （ B） Because medical records were too difficult to be obtained. （ C） B
33、ecause some intensive users were not included. （ D） Because more cancers were discovered after the research. 9 It is reported that the Interphone study report has been put off repeatedly because the study investigators of are_. 10 In order to reduce the risks of RF radiation, people may use cell pho
34、nes speaker or_. 11 The cell-phone cases sold by Pong Research can channel waves away from the head to_. Section A Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both
35、 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 A, B, C and D, and decide which is the best answer. （ A） Put in another one dollar. （ B） Strike the machine. （ C） Concentrate on the work.
36、（ D） Eat something before work. （ A） Go to the music shop with the woman. （ B） Borrow some money from the woman. （ C） Lend some money to the woman. （ D） Buy some CDs for the woman. （ A） The woman bought a cheap TV. （ B） The woman won the lottery. （ C） The woman paid more for the TV. （ D） 200 dollars
37、 is a big deal for the woman. （ A） The animals in the next door. （ B） The weather today. （ C） The temperature in the room. （ D） The new refrigerator. （ A） The working hours are too long for him. （ B） He isnt satisfied with the salary. （ C） The working place is far from his home. （ D） He doesnt like
38、his boss. （ A） He needs more sleep because he is exhausted. （ B） He seldom disturbs the womans sleep. （ C） He has sleep problems all the time. （ D） He looks like a big elephant in shape. （ A） He is under a lot of stress lately. （ B） He cant concentrate on the work. （ C） He needs the womans help. （ D
39、） He wants to quit the job. （ A） Choose a kind of jelly. （ B） Refuse these jellies. （ C） Choose some fruits. （ D） Invite the man to have dinner. （ A） To pay the man back some money. （ B） To learn some exercise knowledge. （ C） To keep in good shape. （ D） To choose an expert she believes in. （ A） Chan
40、ging customers habits in a scientific way. （ B） Designing the suitable exercise equipment. （ C） Providing health assessment for the customers. （ D） Helping to use the heart rate monitor. （ A） She is recommended by an old member. （ B） She will sign up for one year. （ C） The club reopens this week. （
41、D） The club will celebrate its anniversary this week. （ A） Do a summer job. （ B） Do baby-sitting. （ C） Stay at home. （ D） Travel around. （ A） They hired Tom to take care of their house. （ B） They left their house empty. （ C） They asked neighbors to look after their house. （ D） They hired a baby-sitt
42、er. （ A） Treating friends of the house-owner. （ B） Sweeping the floor every day. （ C） Watering the garden. （ D） Cutting grass on the lawn. （ A） Went to Tom for advice. （ B） Ask the woman to find a job for him. （ C） Try to apply for a job as a house-sitter. （ D） Go back home to study. Section B Direc
43、tions: 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. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D. （ A） She got seriously
44、 ill. （ B） She was knocked down. （ C） She fell over and hurt herself. （ D） She was hit by a car. （ A） Look down at our feet. （ B） Look ahead of us. （ C） Control our running speed. （ D） Look at the cars ahead. （ A） By observing the surroundings. （ B） By not running on crowed roads. （ C） By using prop
45、er running form. （ D） By passing the crossroad quickly. （ A） It affects economic growth in Asia. （ B） It leads to more childrens early death. （ C） It affects peoples mental health. （ D） It contributes to some deadly diseases. （ A） Alcohol causes more young people to die than adults. （ B） Most of alc
46、ohol is consumed by young people. （ C） Alcohol contributes to many young peoples premature death. （ D） WHO needs more young men to do volunteer work. （ A） Effective legislations and laws should be implemented. （ B） The WHO should talk people into giving up alcohol. （ C） The wine on the market should
47、 be of high quality. （ D） All the alcohol advertising should be strictly banned. （ A） Stop to buy an umbrella. （ B） Run quickly than usual. （ C） Find shelter from rain. （ D） Walk in normal speed. （ A） Running gets a person wetter while raining. （ B） Running fast keeps a person totally dry while rain
48、ing. （ C） Running has a little impact on keeping people dry while raining. （ D） Running cannot protect people from getting wet while raining. （ A） The researcher made wrong calculation of average walking pace. （ B） The researcher ignored the distance running in the rain. （ C） The researcher over-est
49、imated psychological effect. （ D） The researcher didnt use advanced technology to analyze data. （ A） Running when caught in a storm. （ B） Sheltering from the rain under a tree. （ C） Taking an umbrella with you. （ D） Walking in the rain rather than running. Section C Directions: In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for the second
