单选题After supper we usually take a stroll around the park for about an hour.A. walkB. restC. bathD. breath

单选题The constant friction of the wire on the metal pulley eventually caused it to break. A. declining B. ageing C. pulling D. rubbing

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}}Singing Alarms Could Save the Blind{{/B}} If you cannot see, you may not be able to find your way out of a burning building -- and that could be fatal. A company in Leeds could change all that{{U}} (51) {{/U}}directional sound alarms capable of guiding you to the exit. Sound Alert, a company{{U}} (52) {{/U}}the University of Leeds, is installing the alarms in a residential home for{{U}} (53) {{/U}}people in Sommerset and a resource centre for the blind in Cumbria. {{U}}(54) {{/U}} produce a wide range of frequencies that enable the brain to determine where the{{U}} (55) {{/U}}is coming from. Deborah Withington of Sound Alert says that the alarms use most of the frequencies that can be{{U}} (56) {{/U}} by humans. "It is a burst of white noise {{U}}(57) {{/U}}people say sounds like static on the radio," she says. "Its life-saving potential is great." She conducted an experiment in which people were filmed by thermal-imaging cameras trying to find their way out of a large{{U}} (58) {{/U}}room. It{{U}} (59) {{/U}}them nearly four minutes to find the door {{U}}(60) {{/U}}a sound alarm, but only 15 seconds with one. Withington studies how the brain {{U}}(61) {{/U}}sounds at the university. She says that the {{U}}(62) {{/U}} of a wide band of frequencies can be pinpointed more easily than the source of a narrow band. Alarms{{U}} (63) {{/U}}the same concept have already been installed on emergency vehicles. The alarms will also include rising or falling frequencies to indicate whether people should go up{{U}} (64) {{/U}}down stairs. They were{{U}} (65) {{/U}}with the aid of a large grant from British Nuclear Fuels.

单选题Knowing that I had been out of work now, they were unwilling to lend me money.

单选题The music was a little loud, but {{U}}except{{/U}} that it was a great concert.

单选题Unidentified Flying Object Unidentified Flying Object (UFO) is any object or light, reportedly sighted in the sky, that cannot be immediately explained by the observer. Sightings of unusual flying objects date back to ancient times, but UFOs (sometimes called flying saucers) became widely discussed only after the first widely publicized US sighting in 1947. Many thousands of such observations have since been reported worldwide. At least 90 percent of UFO sightings can be identified as conventional objects, although time-consuming investigations are often necessary for such identification. The objects most often mistaken for UFOs are bright planets and stars, aircraft, birds, balloons, kites, aerial flares, peculiar clouds, meteors, and satellites. The remaining sightings most likely can be attributed to other mistaken sightings or to inaccurate reporting, tricks, or delusions, although to disprove all claims made about UFOs is impossible. From 1947 to 1969 the US Force investigated UFOs as a possible threat to national security. A total of 12,618 reports were received, of which 701 reports, or 5.6 percent, were listed as unexplained. The air force concluded that "no UFO reported, investigated, and evaluated by the Air Force has ever given any indication of threat to our national security." Since 1969 no agency of the US government has had any active program of UFO investigation. Some persons, however, believe that UFOs are extraterrestrial spacecraft, even though no scientifically valid evidence supports that belief. The possibility of extraterrestrial civilizations is not the stumbling block; most scientists grant that intelligent life may well exist elsewhere in the universe. A fully convincing UFO photograph has yet to be taken, however, and the scientific method requires that highly speculative explanations should not be adopted unless all of the more ordinary explanations can be ruled out. UFO enthusiasts persist, however, and some persons even claim to have been captured and taken aboard UFOs. No one has produced scientifically acceptable proof of these claims. Behavioral scientist Carl Sagan once proposed that "certain psychological needs are met by belief in superior beings from other worlds."

单选题The Old Gate In the Middle Ages the vast majority of European cities had walls around them. This was partly for defensive 1 but another factor was the need to keep out anyone regarded as undesirable, like people with contagious 2 . The Old City of London gates were all 3 by the end of the 18th century. The last of London"s gates was removed a century ago, but by a 4 of luck, it was never destroyed. This gate is, in 5 fact, not called a gate at all; its name is Temple Bar, and it marked the 6 between the Old City of London and Westminster. In 1878 the Council of London took the Bar down, numbered the stones and put the gate in 7 because its design was 8 it was expensive to 9 and it was blocking the traffic. The Temple Bar Trust was 10 in the 1970"s with the intention of returning the gate home. The aim of the trust is the 11 of the nation"s architectural heritage. Transporting the gate will mean physically pulling it 12 , stone by stone, removing and rebuilding it near St Paul"s Cathedral. Most of the facade of the gate will probably be 13 , though there is a good 14 that the basic structure will be soured. The hardest 15 of all, however, will be to recreate the statues of the monarchs that once stood on top of the gate.

单选题Contact your doctor if the cough persists.A. insistsB. perseveresC. continuesD. resists

单选题Therapeutic Touch A nine-year-old schoolgirl single-handedly cooks up a science-fair equipement that ends up debunking a widely practiced medical treatment. Emily Rosa's target was a practice known as therapeutic touch (TT for short), whose advocates manipulate patients' "energy field" to make them feel better and even, say some, to cure them of various ills. Yet Emily's test shows that these energy fields can't be detected, even by trained 'TT practitioners. Obviously mindful of the publicity value of the situation, Journal editor George Lundberg appeared on TV to declare, "Age doesn't matter. It's good science that matters, and this is good science." Emily's mother Linda Rosa, a registered nurse, has been campaigning against TT for nearly a decade. Linda first thought about TT in the late 80s, when she learned it was on the approval list for continuing nursing deduction in Colorado. Its 100,000 trained practitioners (48,000 in the US) don't even touch their patients. Instead they waved their hands a few inches from the patient's body, pushing energy fields around until they are in "balance". TT advocates say these manipulations can help heal wounds, relative pain and reduce fever. The claims are taken seriously enough that TT therapists are frequently hired by leading hospitals, at up to $ 70 an hour, to smooth patients, energy, sometimes during surgery. Yet Rosa cold not find any evidence that it works. To provide such proof, TT therapists would have to sit down for independent testing—something they haven't been eager to do, even though James Randi has offered more than $1 million to anyone who can demonstrate the existence of a human energy field. (He has had one taker so far. She failed. ) A skeptic might conclude that TT practitioners are afraid to lay their beliefs on the line. But who could turn down an innocent forth-grader? Says Emily: "I think they didn't take me very seriously because I am a kid." The experiment was straightforward; 21 TT therapists stuck their hands, palms up, through a screen. Emily held her own hand over one of their—left or right—and the practitioners had to say which hand it was. When the results were recorded, they had done no better than they would have by simply guessing. If there was an energy field, they wouldn't feel it.

单选题It doesn"t stand to reason that he would lie.

单选题Our plan is to allocate one member of staff to handle appointments

单选题You {{U}}startled{{/U}} me when you shouted.

单选题Florence Nightingale Florence Nightingale was born in Florence, Italy, while her wealthy English parents were traveling in Europe. As a child, she traveled to many places with her family and learned how to speak several languages. When Nightingale was 17, she told her family that she was going to help sick people. Her parents did not approve, but Nightingale was determined. She traveled to hospitals all over Europe. She saw that doctors were working too hard. She saw that patients died because they did not get enough care. Nightingale felt that women could be doing more to help doctors take care of sick people. Nightingale knew that in order for nurses to do more, they needed special training in how to take care of sick people. Nightingale went to a hospital in Germany to study nursing. Then she returned to London and became the head of a group of women called Gentlewomen During lllness. These women cared for sick people in their homes. In 1854, England was fighting a war with Russia. War reporters wrote about the terrible conditions in the hospitals that cared for the wounded. People demanded that something be done about it. A leader of the government asked Florence Nightingale to take some nurses into the war hospitals. So, in November 1854, Nightingale finally got to work in a hospital. he took along 38 nurses whom she had trained herself. At first, the doctors on the battlefields did not want Nightingale and her nurses in their hospitals. They did not believe that women could help. But in fact, the nurses did make a difference. They worked around the clock, tending the sick. Thanks to their hard work, many wounded soldiers survived. After the war, Nightingale and her nurses were treated like heroes. Finally, in 1860, she started the Nightingale School for Nurses. In time, thanks to Florence Nightingale, nursing became an important part of medicine.

单选题The police took fingerprints and {{U}}identified{{/U}} the body．

单选题We happen to agree with a lot of people who think that sequestration (capturing carbon and burying it underground) is probably not really a good idea. It prevents it from going in the air, but then if you are going to hide it somewhere, there are all kinds of questions on how and where you are going to hide it. Are you sure that it is not going to be released? Why isn't sequestration really a good idea?A. Because people are not sure yet how and where to hide carbon.B. Because people are sure that carbon will not release after buried.C. Because it will prevent carbon from going into the air.D. Because capturing carbon is too difficult to put into practic

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。 {{B}}El Nino{{/B}} While some forecasting methods had limited success predicting the 1997 El Nino a few months in advance, the Columbia University researchers say their method can predict large El Sino events up to two years in advance. That would be good news for governments, farmers and others seeking to plan for the droughts and heavy rainfall that El Nino can produce in various parts of the world. Using a computer, the researchers matched sea-surface temperatures to later El Nino occurrences between 1980 and 2000 and were then able to anticipate El Nino events dating back to 1857, using prior sea-surface temperatures. The results were reported in the latest issue of the journal Nature. The researchers say their method is not perfect, but Bryan C. Weare, a meteorologist at the University of California, Davis, who was not involved in the work, said it "suggests El Nino is indeed predictable." "This will probably convince others to search around more for even better methods," said Weare. He added that the new method "makes it possible to predict El Nino at long lead timess." Other models also use sea-surface temperatures, but they have not looked as far back because they need other data, which is only available for recent decades, Weare said. The ability to predict the warming and cooling of the Pacific is of immense importance4. The 1997 El Nino, for example, caused an estimated $20 billion in damage worldwide, offset by beneficial effects in other areas, said David Anderson, of the European Centre for Medium-Range Weather Forecasts in Reading, England. The 1877 El Nino, meanwhile, coincided with a failure of the Indian monsoon and a famine that killed perhaps 40 million in India and China, prompting the development of seasonal forecasting, Anderson said. When El Nino hit in 1991 and 1997, 200 million people were affected by flooding in China alone, according to a 2002 United Nations report. While predicting smaller El Nino events remains tricky, the ability to predict larger ones should be increased to at least a year ff the new method is confirmed. El Nino tends to develop between April and June and reaches its peak between December and February. The warming tends to last between 9 and 12 months and occurs every two to seven years. The new forecasting method does not predict any major El Nino events in the next two years, although a weak warming toward the end of this year is possible.

单选题Even with detailed knowledge about an area, geologists cannot easily locate stores of underground natural gas.

单选题Keep your passport in a Usecure /U place

单选题A crowd gathered to see what had happened.

单选题Don't be afraid. I am not going to hurt you. A. fear B. astonished C. shocked D. frightened