单选题Eventually , she got a job and moved to London.

单选题The Klondike was the scene of one of the biggest gold rashes the world has ever known. A. location B. view C. event D. landscape

单选题Poisonous {{U}}vapors{{/U}} burst out of the factory during the accident, causing several hundred deaths. A. gases B. threat C. fuels D. bubbles

单选题The dentist has decided to take out the girl"s bad tooth.

单选题Late-Night Drinking Coffee lovers beware. Having a quick "pick-me-up" cup of coffee late in the day will play havoc with your sleep. As well as being a stimulant, caffeine interrupts the flow of melatonin, the brain hormone that sends people into a sleep. Melatonin levels normally start to rise about two hours before bedtime. Levels then peak between 2 a.m. and 4 a.m., before falling again. "It"s the neurohormone that controls our sleep and tells our body when to sleep and when to wake," says Manrice Ohayon of the Stanford Sleep Epidemiology Research Center at Stanford University in California. But researchers in Israel have found that caffeinated coffee halves the body"s levels of this sleep hormone. Lotan Shilo and a team at the Sapir Medical Center in Tel Aviv University found that six volunteers slept less well after a cup of caffeinated coffee than after drinking the same amount of decaf. On average, subjects slept 336 minutes per night after drinking caffeinated coffee, compared with 415 minutes after decal. They also took half an hour to drop off—twice as long as usual—and jigged around in twice as much. In the second phase of the experiment, the researchers woke the volunteers every three hours and asked them to give a urine sample. Shilo measured concentrations of a breakdown product of melatonin. The results suggest that melatonin concentrations in caffeine drinkers were half those in decaf drinkers. In a paper accepted for publication in Sleep Medicine, the researchers suggest that caffeine blocks production of the enzyme that drives melatonin production. Because it can take many hours to eliminate caffeine from the body, Ohayon recommends that coffee lovers switch to decaf after lunch.

单选题Red flag was placed there as a token of danger.

单选题lacking a care for AIDS, society must offer education, not only by public pronouncement but in classrooms. Those with AIDS or those at high risk of AIDS suffer prejudice, they are feared by some people who find living itself unsafe, while others conduct themselves with a "bravado(冒险心理)"that could be fatal. AIDS has afflicted a society already short on humbanism, open--handedness and optimism. Attempts to strike it out with the offending microbe are not abetted(教唆)by pre--existing social ills. Such concerns impelled me to offer the first university--level undergraduate AIDS course, with its two important aims: To address the fact that AIDS is caused by a virus, not by moral failure or social collapse. The proper response to AIDS is compassion coupled with an understanding of the disease itself. We wanted to foster(help the growth of) the idea of a humane society. To describe how AIDS tests the institutions upon which our society rests. The economy, the political system, science, the legal Establishment, the media and our moral ethical--philosophical attitudes must respond to the disease. Those responses, whispered, or shrieked, easily accepted or highly controversial, must be put in order if the nation is to manage AIDS. Scholars have suggested that how a society deals with the threat of AIDS describes the extent to which that society has the right to call itself civilized. AIDS, then, is woven into the tapestry(挂毯)of modern society; in the course of explaining that tapestry, a teacher realizes that AIDS may bring about changes of historic proportions. Democracy obliges its educational system to prepare students to become informed citizens, to join their voices to the public debate in spried by AIDS. Who shall direct just what resources of manpower and money to the problem of AIDS? Even more basic, who shall formulate a national policy on AIDS? The educational challenge, then, is to enlighten(启发)the individual and the social, or public , responses to AIDS.

单选题The conference explored the possibility of closer trade links.

单选题The need for more teachers of science and mathematics shows no sign of Udecreasing/U in the near future.

单选题Her shoes go with her gloves; they look very well together.A. suitB. matchC. fitD. compete

单选题The old concerns lose importance and some of them vanish altogether.A. developB. disappearC. lingerD. renew

单选题It seems that there is a fall in the crime rate.A. dropB. riseC. abilityD. increase

单选题Effects of Exercise on Elderly Diabetics (糖尿病人) Most older people with so-called type 2 diabetes (糖尿病) could stop taking insulin (胰岛素) if they would do brisk (轻快的) exercise for 30 minutes just three times a week, according to new medical research results reported in a Copenhagen newspaper. Results from tests conducted on diabetics at the Copenhagen central hospital Rigshospitalet's Center for Muscle Research showed that physical exercise can boost the body's ability to make use of insulin by 30 per cent. This is equal to the effect most elderly diabetics get from their insulin medication (药物治疗) today. Researchers had a group of non-diabetic men and a group of men with type 2 diabetes, all more than 60 years of age, exercise on bicycles six times a week for three months. After the three months the doctors measured how much sugar the test subjects' muscles could make use of as a measure for how well their insulin worked. Associate Professor Dr Flemming Dela of the Muscle Research Center said the tests demonstrated that the exercising diabetics had made as good use of insulin as the healthy non-diabetic persons. “This means that the insulin works just as well for both groups. Physical exercise cannot cure people of diabetes, but it can eliminate almost all their symptoms. At the same time, it can put off the point at which they have to begin taking insulin," Dela said. Insulin is a hormone produced by the pancreas (胰腺), controlling sugar in the body and is used against diabetes. Dela said that to achieve the desired effect diabetics need only exercise to the point where they begin to sweat, but that the activity has to be maintained since it wears off after five days without sufficient exercise. Most diabetics realize that they have to watch their diet while remaining unaware of the importance of exercise, Dela added.

单选题Her income is not sufficient to support her family.

单选题{{U}}Beware{{/U}} of pickpockets in public places.

单选题"I'm not meddling, " Mary said mildly. "I'm just curious. " A. gently B. shyly C. weakly D. sweetly

单选题{{B}}第三篇{{/B}} The Iceman On a September day in 1991, two Germans were climbing the mountains between Austria and Italy. High up on a mountain pass, they found the body of a man lying on the ice. At that height (10,499 feet, or 3,200 meters), the ice is usually permanent, but 1991 had been an especially warm year. The mountain ice had melted more than usual and so the body had come to the surface. It was lying face downward. The skeleton (骨架) was in perfect condition, except for a wound in the head. There was still skin on the bones and the remains of some clothes. The hands were still holding the wooden handle of an ax and on the feet there were very simple leather and cloth boots. Nearby was a pair of gloves made of tree bark (树皮) and a holder for arrows. Who was this man? How and when had he died? Everybody had a different answer to these questions. Some people thought that it was from this century, perhaps the body of a soldier who died in World War I, since several soldiers had already been found in the area. A Swiss woman believed it might be her father, who had died in those mountains twenty years before and whose body had never been found. The scientists who rushed to look at the body thought it was probably much older, maybe even a thousand years old. With modern dating techniques, the scientists soon learned that the Iceman was about 5,300 years old. Born in about 3300 B. C. , he lived during the Bronze Age in Europe. At first scientists thought he was probably a hunter who had died from an accident in the high mountains. More recent evidence, however, tells a different story. A new kind of X-ray shows an arrowhead still stuck in his shoulder. It left only a tiny hole in his skin, but it caused internal damage and bleeding. He almost certainly died from this wound, and not from the wound on the back of his head. This means that he was probably in some kind of a battle. It may have been part of a larger war, or he may have been fighting bandits. He may even have been a bandit himself. By studying his clothes and tools, scientists have already learned a great deal from the Iceman about the times he lived in. We may never know the full story of how he died, but he has given us important clues to the history of those distant times.

单选题It seemed incredible that people would still want to play football during a war.A. encouragingB. movingC. unbelievableD. enlightening

单选题John talked over the new job with his wife.A. discussedB. mentionedC. acceptedD. rejected

单选题They had Uput up with/U behavior from their son which they would not have tolerated from anyone else.