单选题The young man is too Ubashful/U to speak to strangers.

单选题When the city was burned in 1814, he Urescued/U many official papers from the town hall.

单选题We had only a vague description of the attacker.

单选题He was rather vague about the reasons why he never finished school.A. brightB. unclearC. generalD. bad

单选题The girl is gazing at herself in the mirror. A．smiling B．laughing C．shouting D．staring

单选题 How to Dress Properly Being less than perfectly well-dressed in a business setting can result in a feeling of profound discomfort that may well require therapy to dispel. And the sad truth is that "clothing mismatches" on the job can ruin the day of the person who is wearing the inappropriate attire (着装), and the people with whom he or she comes in contact. Offices vary when it comes to dress codes. Some businesses have very high standards for their employees and set strict guidelines for office attire, while others maintain a more relaxed attitude. However, it is always important to remember that no matter what your company's attitude is regarding what you wear, you are working in a business environment and you should dress accordingly. Certain items may be more appropriate for evening wear than for a business meeting. Just as shorts and a T-shirt are better suited for the beach than for an office environment, our attire should reflect both your environment and your position. A senior vice president has a different image to maintain than that of a secretary or sales assistant. Like it or not, you will be judged by your personal appearance. This is never more apparent than on "dress-down days", when what you wear can say more about you than any business suit ever could. In fact, people will pay more attention to what you wear on dress-down days than on "business professional" days. Thus, when dressing in "business casual" clothes, try to put some flair into your wardrobe choices, recognizing that the "real" definition of business casual is to dress just one notch (等级) down from what you would normally wear on business-professional attire days. Remember, there are boundaries between your career and your social life. You should dress one way for play and another way when you mean business. Always ask yourself where you are going and how other people will be dressed when you get there. Is the final destination the opera, the beach, or the office? Dress accordingly and you will discover the truth in the axiom (公理) that clothes make the man and the woman. When in doubt, always err on the side of dressing slightly more conservatively than the situation demands.

单选题 阅读下面这篇短文，短文后列出了7个句子，请根据短文的内容对每个句子做出判断。如果该句提供的是正确信息，请选A；如果改句提供的是错误信息，请选B；如果该句的信息文章中没有提及，请选C。 {{B}}The Threat to Kiribati{{/B}} The people of Kiribati are afraid that one day in the not-too-distant future, their country will disappear from the face of the earth - literally. Several times this year, the Pacific island nation has been flooded by a sudden high tide. These tides, which swept across the island and destroyed houses, came when there was neither wind nor rain. "This never happened before," say the older citizens of Kiribati. What is causing these mysterious high tides? The answer may well be global warming. When fuels like oil and coal are being burned, pollutants (污染物) are released; these pollutants trap heat in the earth's atmosphere. Warmer temperatures cause water to expand and also create more water by melting glaciers (冰川) and polar (极地的) ice caps. If the trend continues, scientists say, many countries will suffer. Bangladesh, for example, might lose one-fifth of its land. The coral (珊瑚) island nations of the Pacific, like Kiribati and the Marshall Islands, however, would face an even worse fate - they would be swallowed by the sea. The loss of these coral islands would be everyone's loss. Coral formations are home to more species than any other place on earth. The people of these nations feel frustrated. The sea, on which their economies have always been based, is suddenly threatening their existence. They don't have the money for expensive technological solutions like seawalls. And they have no control over the pollutants, which are being released mainly by activities in large industrialized countries. All they can do is to hope that industrialized countries will take steps to reduce pollution.

单选题Nothing would Uinduce/U me to vote for him again.

单选题Although a herd of African elephants may have {{U}}up to{{/U}} one thousand members, Asiatic elephants live in bands of five to sixty animals.

单选题More than 89 of the buildings in Annapolis, Maryland, were {{U}}erected{{/U}} before the Revolutionary War.

单选题I was impressed by the way he formulated his ideas.

单选题I"m afraid that your daughter has failed to get through her mid-term exams.

单选题They were locked in {{U}}mortal{{/U}} combat.

单选题Sugar Power for Cell Phones Using enzymes commonly found in living cells, a new type of fuel cell produces small amounts of electricity from sugar. If the technology is able to succeed in mass production, you may some day share your sweet drinks with your cell phone. In fuel cells, chemical reactions generate electrical currents. The process usually relies on precious metals, such as platinum. In living cells, enzymes perform a similar job, breaking down sugars to obtain electrons and produce energy. When researchers previously used enzymes in fuel cells, they had trouble keeping them active, says Shelley D. Minteer of St Louis University. Whereas biological cells continually produce fresh enzymes, there's no mechanism in fuel cells to replace enzymes as they quickly degrade. Minteer and Tamara Klotzbach, also of St Louis University, have now developed polymers that wrap around an enzyme and preserve it in a microscopic pocket. "We tailor these pockets to provide the ideal microenvironment" for the enzyme, Minteer says. The polymers keep the enzyme active for months instead of days. In the new fuel cell, tiny polymer bags of enzyme are embedded in a membrane that coats one of the electrodes. When glucose from a sugary liquid gets into a pocket, the enzyme oxidizes it, releasing electrons and protons. The electrons cross the membrane and enter a wire through which they travel to the other electrode, where they react with oxygen in the atmosphere to produce water. The flow of electrons through the wire constitutes an electrical current that can generate power. So far, the new fuel cells don't produce much power, but the fact that they work at all is exciting, says Paul Kenis, a chemical engineer at the University of Illinois at Urbana-Champaign. "Just getting it to work," Kenis says, "is a major accomplishment. /

单选题 New Product Will Save Lives Drinking water that looks clean may still contain bugs(虫子), which can cause illness. A small company called Genera Technologies has produced a testing method in three stages, which shows whether water is safe. The new test shows if water needs chemicals added to it, to destroy anything harmful. It was invented by scientist Dr. Adrian Patton, who started Genera five Years ago. He and his employees have developed the test together with a British water company. Andy Headland, Genera's marketing director, recently presented the test at a conference in the USA and forecast good American sales for it. Genera has already sold 11 of its tests at $42,500 a time in the U.K. and has a further four on order. It expects to sell another 25 tests before the end of March. The company says it is the only test in the U.K. to be approved by the government. Genera was formed five years ago and until October last year had only five employees; it now employs 14. Mr. Headland believes that the company should make around $19 million by the end of the year in the U.K. alone.

单选题Valuing Childhood The value of childhood is easily blurred (变得模糊不清) in today"s world. Consider some recent developments. The child, murderers in the Jonesboro schoolyard shooting case were convicted and sentenced. Two boys, 7 and 8, were charged in the murder of an 11-year-old girl in Chicago. Children who commit horrible crimes appear to act of their own will. Yet, as legal proceedings in Jonesboro showed, the one boy who was able to address the court couldn"t begin to explain his acts, though he tried to apologize. There may have been a motive—youthful jealousy (妒忌) and resentment. But a deeper question remains: Why did these boys and others in similar trouble apparently lack any inner, moral restraint? That question echoes for the accused in Chicago, young as they are. They wanted the girl"s bicycle, a selfish impulse common enough among kids. Redemption (拯救) is a practical necessity. How can value be restored to young lives distorted by acts of violence? The boys in Jonesboro and in Chicago will be confined in institutions for a relatively short time. Despite horror at what was done, children are not—cannot be—dealt with as adults, not if a people wants to consider itself civilized. That"s why politicians" cries for adult treatment of youthful criminals ultimately miss the point. But the moral void (真空) that invites violence has many sources. Family instability contributes, so does economic stress. That void, however, can be filled. The work starts with parents, who have to ask themselves whether they"re doing enough to give their children a firm sense of right and wrong. Are they really monitoring their activities and their developing processes of thought? Schools, too, have a role in building character. So do youth organizations. So do youth enforcement agencies, which can do more to inform the young about laws, their meaning, and their observance (遵守). The goal, ultimately, is to allow all children a normal passage from childhood to adulthood (成年), so that tragic gaps in moral judgement are less likely to occur. The relative few who fill such gaps with acts of violence hint at many others who don"t go that far, but who lack the moral foundations childhood should provide—and which progressive human society relies on.

单选题They used to stroll along the river bank, laughing and chatting.A. walkB. runC. sitD. play

单选题The news will horrify everyone.

单选题 下面的短文后列出了7个句子，请根据短文的内容对每个句子做出判断：如果该句提供的是正确信息，请选择A；如果该句提供的是错误信息，请选择B；如果该句的信息文中没有提及，请选择C。 {{B}}Monarch without a Kingdom{{/B}} This November, a hundred million butterflies will drop from the sky over Mexico, like autumn leaves. But for how long? Genetically modified maize (玉米) could mean extinction for this beautiful butterfly, Rafael Ruiz reports. Although its body is about 3 cm long and it only weighs 1 gm, the Monarch butterfly manages to travel 5,000 km each year. It seems to be so fragile, but its long journeys are proof of its amazing ability to survive. This autumn, the Monarch butterfly will once more set out on its journey from the US. It will keep going until it reaches Mexico. It travels these huge distances to escape the cold weather in the north. In November, millions of Monarchs fall like bright, golden rain onto the forests in the mountains of central Mexico. In the silence of these mountains you can hear a strange flapping (拍动) of wings, as the Monarchs arrive at their destination. In the mountains, which reach a height of 3,000 metres, the butterflies are safe. Before reaching their journey's end they have faced strong winds, rain. and snowstorms and they do not all manage to reach their destination. When the winters are really bad, perhaps 70 per cent of them will not survive. Their long journey to Mexico is thought to be one of the most amazing events in the whole of the American continent. When they get there they will stay until the beginning of April, when their internal calendar tells them that it is time to go back. The long journey, with all its dangers, begins again. These delicate creatures now face danger of another kind - from scientific progress. In the US, millions of farms grow genetically modified maize which is pure poison for the butterfly. Laboratory experiments have shown that half of the butterflies which feed on the leaves of genetically modified maize die within 48 hours. Not all experts agree that this variety of maize is responsible for the threat to the Monarchs. In spite of these doubts, the European Union has refused to approve new crops of genetically modified maize until further investigations have been carried out. Greenpeace is campaigning against genetically modified products (in Spain, there are already 20,000 hectares of modified maize). The environmental organization recently published a list of 100 species of butterfly in Europe alone which are threatened with extinction.

单选题Since 1992，cancer death rates among black Americans