单选题{{B}}21-25{{/B}} As people continue to grow and age, our body systems continue to change. At a certain point in your life your body systems will begin to weaken. Your joints may become stiff. It may become more difficult for you to see and bear. The slow change of aging causes our bodies to lose some of their ability to bounce back from disease and injury. In order to live longer, we have always tried to slow or stop this process that leads us toward the end of our lives. Many factors contribute to your health. A well-balanced diet plays an important role. The amount and type of exercise you get is another factor. Your living environment and the amount of stress you are under is yet another. But scientists studying senescence (衰老) want to know: Why do people grow old? They hope that by examining the aging process on a cellular level medical science may be able to extend the length of life.

单选题{{B}}练习六{{/B}} As a medium of exchange, money permits the separation of exchange into the two distinct acts of buying and selling, without requiring the seller to purchase goods from the person who buys his products, or vice versa. Hence producers who know they will be paid in money, can concentrate on finding the most suitable outlet (销路) for their goods, while buyers who will pay in money, can concentrate on finding the cheapest market for the things they wish to purchase. Specialization, which is vital to an advanced economy, is encouraged, because people whose output is not a complete product but only a part of one in which many others are involved can be paid an amount equivalent to their share of the product. Another advantage of money is that it is a measure of value—that is, it serves as a unit in terms of which the relative values of different products can be expressed. In a barter economy it would be necessary to determine how many plates were worth one hundred weight of cotton, or how many pens should be exchanged for a ton of coal, which would be a difficult and time-consuming (费时的) task. The process of establishing relative values would have to be undertaken for every act of exchange, according to what products were being offered against one another, and according to the two parties' desires and preferences. If I am trying to barter fish for bananas, for example, a lot would depend on whether the person willing to exchange bananas is or is not keen on fish. Thirdly, money acts as a store of wealth. It is difficult to imagine saving under a barter system. No one engaged on only one stage in the manufacture of a product could save part of his output, since he would be producing nothing complete. Even when a person actually produced a complete product the difficulties would be overwhelming. Most products deteriorate fairly rapidly, either physically or in value, as a result of long storage; even if storage were possible, the practice of storing products for years on end would involve obvious disadvantages—imagine a coal-miner attempting to save enough coal, which of course is his product, to keep him for life. If wealth could not be saved, or only with great difficulty, future needs could not be provided for, or capital accumulated to raise productivity.

单选题When I was a kid, I never knew what my parents—or anyone else—did for a living. As far as I could tell, all grownups had mysterious jobs that involved drinking lots of coffee and arguing about Richard Nixon. If they had job-related stress, they kept it private. Now American families are expected to be more intimate. While this has resulted in a lot more hugs, "I love you," and attendance at kids' football games, unfortunately we parents also insist on sharing the frustrations of our work lives. While we have complained about our jobs or fallen asleep in car-pool lines, our children have been noticing. They are worried about us. A new survey, "Ask the children," conducted by the Families and Work Institute of New York City, queried more than 1,000 kids between the ages of 8 and 18 about their parents' work lives. "If you were granted one wish to change the way your parents' work affected your life," the survey asked kids, "what would that wish be?" Most parents assumed that children would want more time with them, but only 10% did. Instead, the most common wish (among 34%) was that parents would be less stressed and tired by work. Allison Kevin is the mother of three young children and a professional in the growing field of "work/life quality". Kevin counsels employees who are overwhelmed by their work and family obligations to carefully review their commitments—not only at the office but at home and in the community too—and start paring them down. "It's not about getting up earlier in the morning so you can get more done," she says. "It's about saying no and making choices." We can start by leaving work, and thoughts of work, behind as soon as we start the trip home. Do something to get yourself in a good mood, like listening to music, rather than returning calls on the cell phone. When you get home, change out of your work clothes, let the answering machine take your calls, and stay away from e-mail. When your kids ask about your day, tell them about something good that happened. (In the survey, 69% of moms said they liked their work, but only 42% of kids thought their mothers really did.) Parents can also destress by cutting back on their children's activities. If keeping up with your kid's schedule is killing you, insist that he chooses between karate lessons and the theater troupe. Parents should also sneak away from work and family occasionally to have some fun. I keep a basketball in the trunk of my car. I might never be able to fix everything at work or at home, but at least I can work on my jump shot.

单选题A: Would you mind if I had some time off? B: ______ A: Monday and Tuesday of next week. B: I'd like to say yes, but it's just not possible. A. I highly recommend it. B. When exactly? C. No, thank you. I can manage myself. D. That's it. Thanks.

单选题{{B}}Passage 2{{/B}} In the old days, sending a thank-you note to a relative was easy. You wrote it, {{U}}(1) {{/U}} , a stamp on the envelope and dropped it {{U}}(2) {{/U}} a mailbox. {{U}}(3) {{/U}} it went in a red-white-and-blue U.S. Mail truck, and {{U}}(4) {{/U}} of days later the friendly neighborhood mailman walked it, {{U}}(5) {{/U}}. weather, right to the recipient's door. {{U}} (6) {{/U}} you’re as likely to send a fax, e-mail, or instant message. {{U}}(7) {{/U}} you cling to traditional pen and paper, it's no longer clear (8) it will travel. Airborne Express? Overnight? Two-Day Priority? {{U}} (9) {{/U}} it moves into the 1st century, the American mail system {{U}}(13) {{/U}} to survive. In the past few years, the U.S. Postal Service(USPS) has {{U}}(11) {{/U}} many new services, {{U}}(12) {{/U}} stamps over the Internet, electronic bill payment, and a service that prints and mails electronic documents Yet revenues depleted by alternative communications (e-mail, electronic banking), {{U}}(13) {{/U}} with rising fuel and operating costs, led to a $150 million loss in 2000. Meanwhile, private carriers are competing {{U}}(14) {{/U}} business, forcing the Postal Service to contract with the likes of DHL and Emery Worldwide just to maintain its global reach. {{U}}(15) {{/U}} still delivering 20 percent of the world's mail, the men and women in the blue uniforms of the Postal Service just can't seem to {{U}}(16) {{/U}}. The problem is that the U.S. hasn't {{U}}(17) {{/U}} grips with the fact that in a fast-changing world, mail delivery is better run as a competitive business than as a government monopoly. {{U}}(18) {{/U}} many countries have privatized their postal systems, the USPS has attempted to maintain business in both the public and private worlds. It is a semiprivate corporation with a lumbering government bureaucracy. It is {{U}}(19) {{/U}} by a board of governors {{U}}(20) {{/U}} a blend of local politicians, small-town business leaders and federal bureaucrats.

单选题As they grow older, most people wonder how increasing age will affect intelligence. Can people in middle age and beyond expect to think as effectively and to solve problems as efficiently as they have in the past? One of the difficulties in comparing the intellectual functioning of people at different ages is the problem of cohort((具有相同特征的)一群人) effects. Different age groups in the population have experienced different historical events (wars, exposure to television, and so on) as well as changes in the general standard of living. Different scores that people of varying ages achieve on intelligence tests could be partly due to changes in diet, housing, or health care or, even more likely, to the amount and quality of education. Since the beginning of this century, there has been a trend for more people to go to school and to remain in school longer. Because it eliminates these cohort effects, a longevous (长寿的) study may be the best way to look at age-related changes in intellectual functioning. One of the few longevous studies of intellectual functioning is the Seattle Longevous Study, conducted by K. Warner Schaie and his associates. The original subjects, who ranged in age from 18 to 67, have now been tested 4 times over a 21 year period. These results have given a reasonably good picture of longitudinal(纵向的) change in cognitive abilities. The data show that there are only trivial changes in the kinds of abilities measured by intelligence tests before the age of 60, and no reliable decrease can be shown in these abilities before age 74. Although there is some decrease in measured ability in the late 60s and the 70s, it is not until age 81 that the average person falls below the middle range of performance for young adults. The data from the Seattle Longevous Study also suggest that there are very great individual differences in intellectual change throughout adulthood. Between the ages of 74 and 81, less than half the subjects showed any significant change. One important factor is health, especially the presence or absence of coronary(冠状) heart disease. Another is a high socioeconomic status, which is related not only to higher initial levels of functioning but to the maintenance of a higher level throughout life. A flexible life style in middle age, probably associated with a flexible personality style, also tends to predict high performance in old age. While some of these variables may have substantial hereditary (遗传的) elements, changes in environment and education could also be important in maintaining a higher level of functioning for many individuals.

单选题Many newcomers complain of the rapid ______ of life in Hong Kong.

单选题A: I like this apartment very much, but I"ll come back this evening with my wife and kids. Will that be convenient? B: ______.

单选题Whitman wrote Leaves of Grass as a tribute(赞颂) to the Civil War soldiers who (had laid) on the battlefields and (whom) he (had seen) (while serving) as an army nurse.

单选题 {{B}}Bookkeeper Wanted{{/B}} Job type Temp Full time/Part time Full -Time Diploma/Degree required Associates Salary/Pay rate Please contact us for more information. Job description/qualifications Adecco is looking for Bookkeepers to work for top companies. These are long-term temporary positions with the possibility of temp to hire. Job responsibilities include processing accounts payable and accounts receivable.Prepare and post monthly and yearly journal entries.Process payroll, and some light administrative work.{{B}}Qualifications:{{/B}}Three years experienceExcellent communication skillsSolid organizational skillsStrong analytical and problem-solving skillsMicrosoft ExcelQuickbooksAdecco is a global leader in employment and HR service, connecting people to jobs and jobs to people through its network of more than 6,000 offices in 71 countries/territories around the world. Our temporary and full-time assignments offer competitive pay and excellent benefits. Adecco is an equal opportunity employer. Contact Information Adecco San Mateo Branch1065 E. Hillsdale Blvd.Foster City, CA 94404Phone: 650-350-1308E-mail: sanmateo@ adeccona.com

单选题Mum: What a mess! Is that your shoe on the chair? Son: ______

单选题If only I ______ the books on the reading list before I attended the lecture.

单选题It is often claimed that nuclear energy is something we cannot do without. We live in a consumer society where there is an enormous demand for commercial products of all kinds. Moreover, an increase in industrial production is considered to be one solution to the problem of mass unemployment. Such an increase presumes an abundant and cheap energy supply. Many people believe that nuclear energy provides an inexhaustible and economical source of power and that it is therefore essential for an industrially developing society. There are a number of other advantages in the use of nuclear energy. Firstly, nuclear power, except for accidents, is clean. A further advantage is that a nuclear power station can be run and maintained by relatively few technical and administrative staff. The nuclear reactor represents an enormous step in our scientific evolution and, whatever the antinuclear group says, it is wrong to expect a return to more primitive sources of fuel. However, opponents of nuclear energy point out that nuclear power stations bring a direct threat not only to the environment but also to civil liberties. Furthermore, it is questionable whether ultimately nuclear power is a cheap source of energy. There have, for example, been very costly accidents in America, in Britain and, of course, in Russia. The possibility of increases in the cost of uranium (铀) in addition to the cost of greater safety provisions could price nuclear power out of the market. In the long run, environmentalists argue nuclear energy wastes valuable resources and disturbs the ecology to an extent which could bring about the destruction of the human race. Thus, if we wish to survive, we cannot afford nuclear energy. In spite of the case against unclear energy outlined above, nuclear energy programmes are expanding. Such an expansion assumes a continual growth in industrial production and consumer demands. However, it is doubtful whether this growth will or can continue. Having weighed up the arguments on both sides, it seems there are good economic and ecological reasons for sources of energy other than nuclear power.

单选题I suggested he should______himseff to his new conditions. A. adapt B. adopt C. regulate D. suit

单选题Brown: Firstly, allow me to introduce myself. My name is John Brown, manager of the company. Nate: ______ A. You must be mistaken. I don't know you at all. B. Hello, Brown! I haven't seen you for ages. C. Very nice to see you, Mr. Brown. D. Hi, John! Welcome to our company.

单选题Some historians say that the most important contribution of Dwight Eisenhower's presidency (总统任期 ) in the 1950s was the U.S. interstate highway system. It was a (1) project, easily surpassing the scale of such previous human (2) as the Panama Canal. Eisenhower's interstate highways (3) the nation together in new ways and (4) major economic growth by making commerce less (5) . Today, an information superhighway has been built—an electronic network that (6) libraries, corporations, government agencies and (7) . This electronic superhighway is called the Internet, (8) it is the backbone (主干) of the World Wide Web. The Internet had its (9) in a 1969 U.S. Defense Department computer network called ARPAnet, which (10) Advanced Research Projects Agency Network. The Pentagon built the network for military contractors and universities doing military research to (11) information. In 1983 the National Science Foundation (NSF) , (12) mission is to promote science, took over. This new NSF network (13) more and more institutional users, many of (14) had their own internal networks. For example, most universities that (15) the NSF network had intra-campus computer networks. The NSF network (16) became a connector for thousands of other networks. (17) a backbone system that interconnects networks, Internet was a name that fit. So we can see that the Internet is the wired infrastructure (基础设施) on which web (18) move. It began as a military communication system, which expanded into a government-funded (19) 19 research network. Today, the Internet is a user-financed system tying institutions of many sorts together (20) an "information superhighway".

单选题Between 1900 and 1912, the nations of Europe were at peace. But there were hostilities, rivalries, and conflicts brewing that would soon tear the whole continent apart. The great conflict was World War Ⅰ. (1) just prior to that war, there were two (2) conflicts in the Balkan Peninsula. These two short wars took place in 1912 and 1913. Their (3) result was to end the (4) of the Turkish Ottoman Empire in Europe. The more tragic (5) of the Balkan Wars was to heighten the already fierce international tensions that were (6) the nations of Europe toward World War Ⅰ.In 1912 the Balkan nations (7) of Bosnia, Herzegovina, Montenegro, Serbia, Romania, Bulgaria, and Greece. The Macedonian region in northern Greece was under the (8) of the Turks. The Balkan lands were also peopled by many intensely nationalistic ethnic groups. Among these were Serbs, Croats, Slovenes, Bulgars and Macedonians. These peoples had long been fierce rivals for territory and political (9) . Religious (10) between Roman Catholics and Eastern Orthodox Christians within these groups further added to their disputes. These rivalries still (11) . Serbia, Bulgaria, Greece, and Montenegro formed the Balkan League in 1912. In October 1912 the Balkan League (12) war (13) the Ottoman Turks. The Balkan (14) were quickly victorious. They won battles (15) Skopje, Monastir and other cities. The war ended in December. In May 1913 a treaty signed in London formally (16) the conflict. The Turks lost most of their European (17) . (18) , the peace did not last. In June 1913 Bulgaria attacked Serbia and Greece. This (19) conflict was ended by a (20) signed in Bucharest in August 1913.

单选题One day I ______ a newspaper article about the retirement of an English professor at a nearby state college.

单选题 In the United States, 30 percent of the adult population has a "weight problem". To many people, the cause is obvious: they eat too much. But scientific evidence does little to support this idea. Going back to the America of the 1910s, we find that people were thinner than today, yet they ate more food. In those days people worked harder physically, walked more, used machines much less and didn't watch television. Several modern studies, moreover, have shown that fatter people do not eat more on the average than thinner people. In fact, some investigations, such as the 1979 study of 3 545 London office workers, report that, on balance, fat people eat less than slimmer people. Studies show that slim people are more active than fat people. A study by a research group at Stanford University School of Medicine found the following interesting facts: The more the men ran, the more body fat they lost. The more they ran, the greater amount of food they ate. Thus, those who ran the most ate the most, yet lost the greatest amount of body fat.