单选题 Once-daily Pill Could Simplify HIV Treatment 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 (51) of drugs. But that can mean a lot of pills to take. It would be (52) 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 (53) treatment for HIV, the virus that causes AIDS. The companies are Bristol-Myers Squibb and Gilead Sciences. They have (54) a single pill that combines three drugs currently on the market. Bristol-Myers Squibb sells one of them (55) the name of Sustiva. Gilead combined the (56) , Emtriva and Viread, into a single pill in two thousand four. Combining drugs involves more than (57) issues. It also involves issues of competition (58) the drugs are made by different companies. The new once-daily pill is the result of (59) 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 (60) to that of the widely used combination of Sustiva and Combivir. Combivir (61) 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 (62) 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 (63) 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 (64) the new pill. There are limits to who could take it because of the different drugs it contains. For example, (65) 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Our statistics show that we consume all that we are capable of producing.

单选题Of all the planets in this solar system, Mercury is nearest to the Sun.

单选题{{B}}第二篇{{/B}} {{B}}Calling for Safe Celebrations This Fourth of July{{/B}} Last Fourth of July, Pete, a 14-year-old boy, was enjoying the lit-up skies and loud booms from the fireworks being set off in his neighborhood. Suddenly, the evening took a terrible turn. A bottle rocket shot into his eye, immediately causing him terrible pain. His family rushed him to the emergency room for treatment. As a result of the injury, Pete developed glaucoma and cataracts. Today, Pete has permanent vision loss in his injured eye because of his bottle rocket injury. June is Fireworks Eye Safety Awareness Month, and through its EyeSmart campaign the American Academy of Ophthalmology wants to remind consumers to leave fireworks to professionals. "There is nothing worse than a. Fourth of July celebration ruined by someone being hit in the eye with a bottle rocket," said Dr. John C. Hagan, clinical correspondent for the Academy and an ophthalmologist at Discover Vision Centers in Kansas City. "A safe celebration means letting trained professionals handle fireworks while you enjoy the show." According to the U. S. Consumer Product Safety Commission, more than 9,000 fireworks-related injuries happen each year. Of these, nearly half are head-related injuries, with nearly 30 percent of these injuries to the eye. One-fourth of fireworks eye injuries result in permanent vision loss or blindness. Children are the most common victims of firework abuse, with those fifteen years old or younger accounting for 50 percent of fireworks eye injuries in the United States. Dr. Hagan estimates that his practice sees more than 30 injuries each year from fireworks. Even fireworks that many people consider safe represent a threat to the eyes. For children under the age of five, apparently harmless sparklers account for one-third of all fireworks injuries. Sparklers can burn at nearly 2,000 degrees Fahrenheit.

单选题Explorer of the Extreme Deep Oceans cover more than two-thirds of our planet. Yet, just a small fraction of the underwater world has been explored. Now, Scientists at the Woods Holel Oceanographic Institution (WHOI) in Massachusetts are building an underwater vehicle hat will carry explorers as deep as 6,500 meters (21,320 feet). The new machine, known as a manned submersible or human-operated vehicle (HOV), will replace another one named Alvin which bas an amazing record of discovery, playing a key role in various important and famous undersea expeditions. Alvin has been operating for 40 years but can go down only 4,500 meters (14,784 feet). It"s about time for an upgrade, WHOI researchers say. Alvin was launched in 1964. Since then, Alvin has worked between 200 and 250 days a year, says Daniel Fornari, a marine geologist and director of the Deep Ocean Exploration Institute at WHOI. During its lifetime, Alvin has carried some 12,000 people on a total of more than 3,000 dives. A newer, better versions of Alvin is bound to reveal even more surprises about a world that is still full of mysteries, Fornari says. It might also make the job of exploration a little easier. "We take so much for granted on land," Fornari says. "We can walk around and see with our eyes how big things are. We can see colors, special arrangements." Size-wise, the new HOV will be similar to Alvin. It"ll be about 37 feet long. The setting area inside will be a small sphere, about 8 feet wide, like Alvin, it"ll carry a pilot and two passengers. It will be just as maneuverable. In most other ways, it will give passengers more opportunities to enjoy the view, for one thing. Alvin has only three windows, the new vehicle will have five, with more overlap so that the passengers and the pilot can see the same thing. Alvin can go up and down at a rate of 30 meters every second, and its maximum speed is 2 knots (about 2.3 miles per hour), while the new vehicle will be able to ascend and descend at 44 meters per second. It"ll reach speeds of 3 knots, or 3.5 miles per hour.

单选题My grandmother died just a few months after my grandfather, even (51) she was in good health and had (52) been sick in her life. My grandfather was a strong independent man who worshipped my grandmother. He never allowed her to work or to want (53) anything and remained deeply in love with her, often publicly (54) his affection, until he died. He was a traditional family doctor (55) made house calls and regarded his patients (56) his family. My grandmother' s (57) identity revolved around being "doctor' s wife". In hindsight I realized she never developed any interests (58) her own. In fact, she seemed to have no interests (59) from his interests. As "doctor' s Wife", she (60) him, the family and the house. When the children became independent, she became even more attentive to him and didn't (61) any other interests to replace the missing children. When grandfather died, we all tried to visit her often and tried to persuade her (62) our families. She told us to give her a little time to (63) and said that for the time being she preferred to stay home. About three months later, I found her (64) in grandfather' s bed having passed away from an apparent heart (65) . In retrospect I think that she had died in spirit when grandfather passed away. When he died, her identity died and soon there after her body.

单选题It has been said that the Acts provided a new course of action and did not merely Urequlate/U or enlarge an old one.

单选题He often finds fault with my work.

单选题He"s spent years cultivating knowledge of art.

单选题They agreed to {{U}}settle{{/U}} the dispute by peaceful means.

单选题The Smog For over a month, Indonesia was in crisis. Forest fires raged out of control as the country suffered its worst drought for 50 years. Smoke from the fires mixed with sunlight and hot dry air to form a cloud of smog. This pollution quickly spread and within days it was hanging over neighbouring countries including Malaysia, Singapore and Thailand. When the smoke combined with pollution from factories and cars, it soon became poisonous(有毒的). Dangerous amounts of CO became trapped under the smog and pollution levels rose. People wheezed(喘息)and coughed as they left the house and their eyes watered immediately. The smog made it impossible to see across streets and whole cities disappeared as grey soot(烟灰) covered everything. In some areas, water was hosed(用胶管浇) from high-rise city buildings to try to break up the smog. Finally, heavy rains, which came in November, put out the fires and cleared the air. But the environmental costs and health problems will remain. Many people from South-Eastern Asian cities already suffer from breathing huge amounts of car exhaust fumes(汽车排放的废气)and factory pollution. Breathing problems could well increase and many nonsufferers may have difficulties for the first time. Wildlife has suffered too. In lowland forests, elephants, deer, and tigers have been driven out of their homes by smog. But smog is not just an Asian problem. In fact, the word "smog" was first used in London in 1905 to describe the mixture of smoke and thick fog. Fog often hung over the capital. Sometimes the smog was so thick and poisonous that people were killed by breathing problems or in accidents. About 4000 Londoners died within five days as a result of thick smog in 1952.

单选题He tried to {{U}}assemble{{/U}} his thoughts. A. gather B. clear C. share D. spare

单选题These programmes are of {{U}}immense{{/U}} value to old people.

单选题All the students were excited at the idea of a weekend sports competition.A. intentionB. idealC. viewD. thought

单选题Explorer of the Extreme Deep Oceans cover more than two-thirds of our planet. Yet, just a small fraction of the underwater world has been explored. Now, scientists at the Woods Hole Oceanographic Institution (WHOI) in Massachusetts are building an underwater vehicle that will carry explorers as deep as 6,500 meters (21,320 feet). The new machine, known as a manned submersible or human-operated vehicle (HOV), will replace another one named Alvin which has an amazing record of discovery, playing a key role in various important and famous undersea expeditions. Alvin has been operating for 40 years but can go down only 4,500 meters (14,784 feet). It"s about time for an upgrade, WHOI researchers say. Alvin was launched in 1964. Since then, Alvin has worked between 200 and 250 days a year, says Daniel Fornari, a marine geologist and director of the Deep Ocean Exploration Institute at WHOI. During its lifetime, Alvin has carried some 12,000 people on a total of more than 3,000 dives. A newer, better versions of Alvin is bound to reveal even more surprises about a world that is still full of mysteries, Fornari says. It might also make the job of exploration a little easier. "We take so much for granted on land," Fornari says. "We can walk around and see with our eyes how big things are. We can see colors, special arrangements. " Size-wise, the new HOV will be similar to Alvin. It"ll be about 37 feet long. The setting area inside will be a small sphere, about 8 feet wide, like Alvin, it"ll carry a pilot and two passengers. It will be just as maneuverable. In most other ways, it will give passengers more opportunities to enjoy the view, for one thing. Alvin has only three windows, the new vehicle will have five, with more overlap so that the passengers and the pilot can see the same thing. Alvin can go up and down at a rate of 30 meters every second, and its maximum speed is 2 knots (about 2.3 miles per hour) , while the new vehicle will be able to ascend and descend at 44 meters per second. It"ll reach speeds of 3 knots, or 3.5 miles per hour.

单选题Steel is an alloy composed {{U}}primarily {{/U}}of iron and carbon.

单选题Only three strategies are available for controlling cancer, prevention, screening and treatment. Lung cancer causes more deaths than any other type of cancer. A major cause of the disease is (51) known; there is no good evidence that screening is of much help; and treatment fails in about 90 per cent of all cases. At present, therefore, the main strategy must be (52) . This may not always be true, of course, as for some other types Of cancer, research (53) the past few decades has produced (or suggested) some important progress in prevention, screening or treatment. (54) , however, we consider not what research may one day offer but what today's knowledge could already deliver that is not being delivered, then the most practicable and cost-effective opportunities for avoiding premature death from cancer, especially lung cancer, probably involve neither screening nor improved (55) , but prevention. This conclusion does not depend on the unrealistic assumption that we can (56) tobacco. It merely assumes that we can reduce cigarette sales appreciably by raising prices or by (57) the type of education that already appears to have had a (58) effect on cigarette consumption by white-collar workers, and that we can substantially reduce the amount of tar delivered per cigarette. The practicability of preventing cancer by such measures applies not only in those countries, (59) the US, where, because cigarette smoking has been common for decades, 25～30 per cent of all cancer deaths now involve lung cancer, but also in those where it has become (60) only recently. In China, for example, lung cancer (61) accounts for only about 510 per cent of all cancer deaths. This is because it may take as much as half a century (62) the rise in smoking to increase the incidence of lung cancer. Countries where cigarette smoking is only now becoming widespread can expect enormous increases in lung cancer during the 1990s or early in the next century, (63) prompt effective action is taken against the habit--indeed., such increases are already plainly evident in parts of (64) . There are four reasons why the prevention of lung cancer is of such overwhelming importance: first, the disease is extremely common, causing more deaths than any other type of cancer now does; secondly, it is generally incurable; thirdly, effective, practicable measures to reduce its incidence are already reliably known; and, finally, (65) tobacco consumption will also have a substantial impact on many other diseases.

单选题He is determined to consolidate his power.A. strengthenB. controlC. abandonD. exercise

单选题The grapes withered on the vine.A. maturedB. shriveledC. rottedD. glistened

单选题United States Navy Admiral Alfred Mahan wrote many books on naval strategy and sea power.A. tacticsB. historyC. battlesD. armaments