单选题Mary gets up at the same time every morning.

单选题 阅读下面的短文，文中有15处空白，每处空白给出4个选项，请根据短文的内容从4个选项中选择1个最佳答案。 The secrets of sleep were a mystery for centuries simply because there was neither the means{{U}} (51) {{/U}}them, nor the need. Only when candles gave way{{U}} (52) {{/U}}gaslight, and gas to electricity, when man became able to{{U}} (53) {{/U}}night into day, and double his output by working shifts round the clock, did people seriously start wondering{{U}} (54) {{/U}}sleep could possibly be a waste of time. Our ability to switch night into day is very recent, and it is {{U}}(55) {{/U}}if we will ever{{U}} (56) {{/U}}want, or be able to give up our habit of{{U}} (57) {{/U}}a good night's sleep.{{U}} (58) {{/U}}, a remarkable research project in London has already discovered a few people who actually enjoy insomnia. Even chronic insomniacs often get hours more sleep.{{U}} (59) {{/U}}they think. But, by placing electric contact{{U}} (60) {{/U}}the eyes and on the head, it is possible to check their complaint by studying the tiny currents we generate which{{U}} (61) {{/U}}the different brainwaves of sleep and{{U}} (62) {{/U}}. This has shown that for some people seven or eight hours sleep a night are quite unnecessary. {{U}} (63) {{/U}}recent work has shown that{{U}} (64) {{/U}}sleep is bad for you, so that if you are fortunate enough to be born with a body which needs only a small{{U}} (65) {{/U}}of sleep, you may well be healthier and happier than someone who sleeps longer.

单选题 阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。 {{B}} Charter Schools{{/B}} American public education has changed in recent years. One change is that increasing numbers of American parents and teachers are starting independent public schools called charter schools. In 1991, there were {{U}}(51) {{/U}} charter schools in the United States. Today, more than 2,300 charter schools {{U}}(52) {{/U}} in 34 states and the District of Columbia2. 575,000 students {{U}}(53) {{/U}} these schools. The students are from 5 years {{U}}(54) {{/U}} age through 18 or older. A charter school is created by groups of parents, teachers and community members. It is similar {{U}}(55) {{/U}} some ways to a traditional public school. It receives tax money to operate just as {{U}}(56) {{/U}} public schools do. The amount it receives depends {{U}}(57) {{/U}} the number of students. The charter school must prove {{U}}(58) {{/U}} local or state governments that its students are learning. These governments provide the school {{U}}(59) {{/U}} the agreement, or charter that permits it to operate. Unlike a traditional public school, {{U}}(60) {{/U}}, the charter school does not have to obey most laws governing public schools. Local, state or federal governments cannot tell it what to teach. Each school can choose its own goals and decide the ways it wants to {{U}}(61) {{/U}} those goals. Class sizes usually are smaller than in many traditional public schools. Many students and parents say teachers in charter schools can be more creative. However, state education agencies3, local education-governing committees and unions often {{U}}(62) {{/U}} charter schools. They say these schools may receive money badly needed by traditional public schools. Experts say some charter schools are doing well while others are struggling. Congress provided 200 million dollars for establishing charter schools in the 2002 federal budget. {{U}}(63) {{/U}}, often the schools say they lack enough money for their programs. Many also lack needed space. {{U}} (64) {{/U}}, many of the 36 charter schools in the District of Columbia hold classes in crowded buildings. These schools have almost 11,000 students. District officials say they have provided 14 former school buildings {{U}}(65) {{/U}} charter education. Yet, charter-school supporters say officials should try harder to find more space.

单选题Foreign money can be converted in this bank.

单选题A Biological Clock Every living thing has what scientists call a biological clock that controls behavior. The biological clock tells (1) when to form flowers and when the flowers should open. It tells (2) when to leave the protective cocoons and fly away, and it tells animals and human beings when to eat, sleep and wake. Events outside the plant and animal (3) the actions of some biological clocks. Scientists recently found, for example, that a tiny animal changes the color of its fur (4) the number of hours of daylight. In the short (5) of winter, its fur becomes white. The fur becomes gray brown in color in the longer hours of daylight in summer. Inner signals control other biological clocks. German scientists found that some kind of internal clock seems to order birds to begin their long migration (6) twice each year. Birds (7) flying become restless when it is time for the trip, (8) they become calm again when the time of the flight has ended. Scientists say they are beginning to learn which (9) of the brain contain biological clocks. An American researcher, Martin Moorhead, said a small group of cells near the front of the brain (10) to control the timing of some of our actions. These (11) tell a person when to (12) , when to sleep and when to seek food. Scientists say there probably are other biological clock cells that control other body activities. Dr. Moorhead is studying (13) our biological clocks affect the way we do our work. For example, most of us have great difficulty if we must often change to different work hours. (14) can take many days for a human body to accept the major change in work hours. Dr. Moorhead said industrial officials should have a better understanding of biological clocks and how they affect workers. He said (15) understanding could cut sickness and accidents at work and would help increase a factory's production.

单选题Enormous sums of money have been spent on space exploration.

单选题Tips on Staying Healthy This lecture will give you advice on how to stay healthy. It will cover ten ways to stay healthy. First, exercise every day. Exercise will help you to maintain your weight. It will also help you to prevent health problems such as cancer and heart disease. Finally, exercise makes you feel good! So get a little exercise every day. Second, get enough sleep. Most people don' t get enough sleep. But sleep helps you to think clearly and do good work. Your body needs to rest. Then you have energy to do your best. So try to sleep at least seven or eight hours every night. Third, eat green things. All green food is good for you. For example, spinach, broccoli, green beans, artichokes, kale, cabbage, green apples, and grapes. Fruits and vegetables are very important to your health. So eat some green things today! Fourth, don't smoke. Smoking causes cancer and other diseases. It can hurt your friends and family when you smoke. It costs a lot of money. So don' t smoke. Fifth, don' t drink a lot of alcohol. Alcohol can cause a lot of problems. Many car accidents are caused by alcohol. Alcohol can make you overweight. So drink a little if you like, but don' t drink a lot. Sixth, wear a seat belt. Many people are injured or killed because they aren't weanng a seat belt. Don' t drive with anyone who is not wearing a seat belt. And make sure your passengers are all wearing a set belt before you drive. Buckle up! Seventh, drink lots of water. Everyone should drink 6 - 8 glasses of water every day. Your body needs water to work well. Water also has no calories. People who dIjnk a lot of water don' t feel as hungry. So drink up! Eighth, visit your doctor for regular checkups. During a checkup your doctor can give you tests and check your health. Many serious health problems are found during a regular checkup. So don' t go to the doctor only when you are sick. See the doctor once a year for a checkup. Ninth, reduce stress. Stress causes many serious health problems. It affects your personal and professional lives. Try to have less stress in your life. Relax more! Stress less. Tenth, spend time with friends and family. We all need to enjoy our life with others. Your friends and family will make you feel good. If you feel good, you will stay healthy! So make time for your loved ones.

单选题 阅读下面这篇短文，短文后列出7个句子，请根据短文的内容对每个句子做出判断。 The idea of test-tube babies may make you starry-eyed with delight at the wonders of modern medicine or bleary-eyed with considering the moral/legal implications of starting life in a laboratory. But if you've ever been pregnant(怀孕的)yourself, one thing is certain: You wonder what it's like to carry a test-tube baby. Are these pregnancies normal? Are the babies normal? The earliest answers come from Australia, where a group of medical experts at the Queen Victoria Medical Center in Melbourne have taken a look at the continent's first nine successful test-tube pregnancies. The Australians report that the pregnancies themselves seemed to proceed according to plan, but at birth some unusual trends did show up. Seven of the nine babies turned out to be girls. Six of the nine were delivered by Caesarean section(剖腹产术). And one baby, a twin, was born with a serious heart defect and a few days later developed life-threatening abdominal(腹剖的)problems. What does it all mean? Even the doctors don't know for sure, because the numbers are so small. The proportion of girls to boys is high, but until there are many more test-tube babies, no one will know whether that's pure coincidence(巧合)or something special. The same thing is true of the single heart defect; it usually shows up in only 15 out of 60,000 births in that part of Australia, but the fact that it occurred in one out of nine test-tube babies does not necessarily mean that they are at special risk. One thing the doctors can explain is the high number of Caesareans. The Australian researchers report that they are quite encouraged. All the babies are now making normal progress--even the twin with the birth defects.

单选题In a bullfight, it is the movement, not the color of objects that arouses the bull.

单选题Physical Exercise Declaring that physical exercise is one of the most powerful medicines to help improve our quality of life is not an exaggeration. The World Health Organization expressed the same view in its 2002 World Heath Report, emphasizing that the damage produced by lack of physical activity was equal to the strong probability of serious illness such as heart disease and even some kinds of cancer. Those who have embraced an active lifestyle for years are familiar with the sort of physical and psycho- logical benefits that come from exercise. Nevertheless a lot of people would never think of physical activity as a way of feeling better, simply because they don"t think they are in need of it, or because they are lazy or maintain that they haven"t got enough time. There are many positive effects that result from physical exercise and they are not only concerned with the physical aspects but also psychological and social ones. Beginning with the physical benefits, physical activity improves the life of the heart, burns off fat, lowers high blood pressure, makes tissues more resistant, and increases muscle flexibility and joint mobility. On a psychological level, physical activity helps reduce anxiety and stress by causing tension to disappear and by encouraging us to have a better sense of ourselves through listening to our bodies during movement. Lastly, seeing ourselves in better health is advantageous socially. The sense of satisfaction thus obtained will result in an increase of self-respect and self-confidence in terms of our ability to interact with others. The benefits linked to exercise have also not gone unnoticed in the business world, with more and more companies setting up gyms on-site. Employees" improved health translates into better performance and reduced costs as well as an increase in people"s satisfaction in the workplace. Physical activity is recommended for all age groups, including children. It is an important growth factor in a child"s education. And for the elderly? There is no doubt that regular physical activity allows greater efficiency in daily life as well as creating more basic independence day by day, including the possibility of keeping in touch with others and not feeling isolated.

单选题Cooking Oil Fumes Cause Tumor The leading cause of lung cancer among women in the city was cooking oil fumes while men are more likely to develop the disease from smoking, said medical experts after a five-year research study. Doctors announced the results yesterday with analysis on some new tendencies in lung cancer. They said patients are younger, especially women. According to the Shanghai Tumor Research Institute, more local residents die of lung cancer in the city than anything else. Following breast cancer, it has the second-highest incidence rate. "An unhealthy lifestyle is a very important reason for lung cancer," said Dr. He Yumin from Shanghai Minshen Traditional Chinese Medicine Tumor Diagnosis and Treatment Center. He followed 2,276 lung cancer patients for five years. Among them, 1,483 were male. Smoking causes 70 percent of cases among men while only 18 percent of female patients developed cancer from smoking or inhaling second-hand smoke, according to the report. However, more than 60 percent of women with the disease had long-term, close contact with strong oil fumes from cooking and complained about irritated eyes and throat. About 32 percent of women fried foods in boiling oil in unventilated kitchens and about 25 percent of women"s bedrooms were adjacent to the kitchen. However, local women were surprised to learn cooking oil fumes could lead to cancer. Some claimed they may change food preparation methods. "Unless my family and I don"t eat at home every day, I must stay in the kitchen to cook," said Xu Li, a 45-year-old local woman. "I know the fumes are bad for the skin, but it is the first time I heard that it can result in lung cancer. I have already started frying less. " Doctors said women"s lung cancer had few links to personal health and physical condition, but was closely related to family cancer history, unhealthy dietary habits and weak immune systems. Other experts agreed with He. "Smoking is by far the biggest cause of lung cancer for men," said Dr. Tan Binyong, honorary president of the Respiratory Disease Institute at Fudan University"s Medical College. "It"s true that second-hand smoke and cooking fumes are the main causes among women. " He"s research also warned people not to stand near of stalls selling fried foods due to the poor quality of oils used. The chance of catching lung cancer is three times higher if exposed to the fume for a long time, experts said.

单选题 阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。 {{B}} Once-daily Pill Could Simplify HIV Treatment{{/B}} Bristol-Myers Squibb and Gilead Sciences have combined many HIV drugs into a single pill. Sometimes the best medicine is more than one kind of medicine. Malaria, tuberculosis and HIV/ AIDS, for example, are all treated with {{U}}(51) {{/U}} of drugs. But that can mean a lot of pills to take. It would be {{U}}(52) {{/U}} if drug companies combined all the medicines into a single pill, taken just once a day. Now, two companies say they have done that for people just {{U}}(53) {{/U}} treatment for HIV, the virus that causes AIDS. The companies are Bristol-Myers Squibb and Gilead Sciences. They have {{U}}(54) {{/U}} a single pill that combines three drugs currently on the market. Bristol-Myers Squibb sells one of them {{U}}(55) {{/U}} the name of Sustiva. Gilead combined the {{U}}(56) {{/U}}, Emtriva and Viread, into a single pill in two thousand four. Combining drugs involves more than {{U}}(57) {{/U}} issues. It also involves issues of competition {{U}}(58) {{/U}} the drugs are made by different companies. The new once-daily pill is the result of {{U}} (59) {{/U}}is described as the first joint venture agreement of its kind in the treatment of HIV. In January the New England Journal of Medicine4 published a study of the new pill. Researchers compared its {{U}}(60) {{/U}} to that of the widely used combination of Sustiva and Combivir. Combivir {{U}}(61) {{/U}} two drags, AZT and 3TC. The researchers say that after one year of treatment, the new pill suppressed HIV levels in more patients and with {{U}}(62) {{/U}} side effects. Gilead paid for the study. Professor Joel Gallant at the Johns Hopkins School of Medicine in Baltimore, Maryland, led the research. He is a paid adviser to Gilead and Bristol-Meyers Squibb as well as the maker of Combivir, Glaxo Smith Kline. Glaxo Smith Kline reacted {{U}}(63) {{/U}} the findings by saying that a single study is of limited value. It says the effectiveness of Combivir has been shown in each of more than fifty studies. The price of the new once-daily pill has not been announced. But Gilead and Bristol-Myers Squibb say they will provide it at reduced cost to developing countries. They plan in the next few months to ask the United States Food and Drug Administration9 to {{U}}(64) {{/U}} the new pill. There are limits to who could take it because of the different drugs it contains. For example, {{U}}(65) {{/U}} women are told not to take Sustiva because of the risk of birth disorders. Experts say more than forty million people around the world are living with HIV.

单选题During the past ten years there have been (dramatic) changes in the international situation.

单选题If a child is left alone, he'll lose his zest for life and his desire to find out new things for himself. A. courage B. direction C. confidence D. interest

单选题These are our motives for doing it.

单选题A Trip Every year New Zealanders living in London can be seen loading up Kombi vans and heading off to experience the "classic European holiday". The trip usually starts in the north of France, after crossing the channel from Dover in England to Calais, driving down through France, over the Pyrenees into Spain, west into Portugal and then across the Continent to Italy and often beyond. There are numerous reasons young New Zealanders take this rite of passage—as well as seeing all the fantastic sights and tasting the delights of Europe"s food and wine, it "s relatively inexpensive. The Kombi is transport and accommodation all in one, cutting down significantly on costs. There is just one problem. As the Kombis become "antique", these trips are usually punctuated with numerous roadside sessions as the van sits idle, in no hurry to start, while you swelter in the hot sun. But do not let this deter you. Travelling Europe in your own vehicle means no public transport schedules to cramp your style, the ability to explore the quaint, off-the-beaten-track villages where the "real" locals live, freedom to not have to book accommodation in advance—you can nearly always get a campsite and can load your vehicle with cheap, fantastic regional wines and souvenirs. With these bonuses in mind, here are some suggestions for planning the great Europe road adventure. The key to a pleasurable driving experience is a good navigator and a driver with a cool head. If you do not feel relaxed driving around New Zealand"s cities and highways, then you probably will not enjoy driving around Europe. As copilot to the driver, you need to read (and understand) maps, look out for turn-offs and keep the music playing. Language is not a big problem once a few essential terms are mastered. The biggest challenge is in the cities, where traffic can be chaotic and elaborate one-way systems and narrow, cobbled alleyways can make finding your destination hard work. It can be easier to leave the vehicle on the outskirts of town or in a camping ground and use public transport. This also avoids paying for costly parking.

单选题We are going to have the TV fixed .

单选题She was ______ the people who worked there.

单选题it can be inferred from Paragraph 5 that DNA fingerprinting

单选题Edwards admitted to being a spy for the KGB in 1980s.A. recognizedB. provedC. confessedD. testified