They（）for hours.

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• Why did the man wait in the heat for two hours?

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  A.×;× B.the;a C.a;× D.an;a

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• Directions: Read the following sentences and decide whether they are correct or proper in language use. Then write Y for yes and N for no in the brackets. 11,000 MDA-MB-231 cells were cultured in each well for 24 hours.

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• The play has been on for two hours so the audience...

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• People tend to amass possessions. Indeed they can have a delightful surprise when they find something useful which they did not know they owned. Some people leave unwanted objects in drawers, cupboards and attics for years, in the belief that they may one day need just those very things. Collecting as a serious hobby is quite different. It provides relaxation for leisure hours, because just looking at one s treasures is always a joy. One does not have to go out for amusement, since the collection is housed at home. Whatever it consists of, stamps, first editions of books, antique furniture, stuffed birds, toy animals, there is always something to do in connection with it, from finding the right place for the latest addition to verifying facts in reference books. This hobby educates one not only in the chosen subject, but also in general matters which have some bearing on it.

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• 听力原文： Russian commandos have stormed a hijacked bus in the southern Tajikistan Republic and freed all 18 hostages aboard. Security officials say the two gunmen who had held the bus for 8 hours were arrested. Officials say no one was seriously hurt in the take-over by a newly-created anti-terrorist squad. The gunmen seized the bus Wednesday night. They had demanded more than a million dollars' ransom and a helicopter to escape. Their motives are unclear although they reportedly told police they needed the money to help drug-addicted friends.

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• Common sense would tell us that physically active children may be more likely to become active and healthy adults.In the United States, elementary and middle schools are advised to give students two and a half hours of physical activity a week.That is what the Centers for Disease Control and Prevention and the American Heart Association recommend (推荐). They say high schools should provide about four hours of physical activity each week. Yet many schools across the country have reduced their physical education programs. Criticism of the cuts has led in some places to efforts to give students more time for exercise, not less.

  The future health of Americans may depend on it. Just this week, a study reported that life expectancy (预期寿命) has fallen or is no longer increasing in some parts of the United States. The situation is worst among poor people in the southern states, and especially women. Public health researchers say it is largely the result of increases in obesity (肥胖), smoking and high blood pressure. They also blame differences in health services around the country. In 2006, a study found that only four percent of elementary schools provided daily physical education all year for all grades. This was true of eight percent of middle schools and two percent of high schools. The study also found that 22 percent of all schools did not require students to take any P. E. (体育课). Charlene Burgeson is the executive director of the National Association for Sport and Physical Education. She says one problem for P. E. teachers is that schools are under pressure to put more time into academic subjects. Also, parents may agree that children need exercise in school. Yet many parents today still have bad memories of being chosen last for teams because teachers favored the good athletes in class. But experts say P. E. classes have changed. They say the goal has moved away from competition and toward personal performance, as a way tp build a lifetime of activity. These days, teachers often lead activities like weight training and yoga. Some parents like the idea of avoiding competitive sports in P.E class. Yet others surely dislike that idea. In the end, schools may find themselves in a no-win situation. Why are schools recommended to give students certain time for sports？ A．Because different schools set up different physical education programs. B．Because the physical activity of children will influence their health in adulthood. C．Because nowadays children spend too much time on their studies. D．Because only four percent of elementary schools provided daily physical education.

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• It is 3 A. M. Everything on the university campus seems ghostlike in the quiet, misty darkness -- everything except the computer center. Here, twenty students untidy and blurred-eyed, sit transfixed at their consoles([计]挖制台), tapping away on the terminal keys. With eyes glued to the video screen, they tap on for hours. For the rest of the world, it might be the middle of the night, but here time does not exist. This is a world unto itself. These young computer "hackers" are pursuing a kind of impulse, a drive so consuming it overshadows nearly every other part of their lives and forms the focal point of their existence. They are compulsive computer programmers. Some of these students have been at the console for thirty hours or more without a break for meals or sleep. Some have fallen asleep on sofas or chairs in the computer center, trying to catch a few winks but hate to get too far away from their beloved machines.

  Most of these students don't have to be at the computer center in the middle of the night. They aren't working on assignments. They are there because they want to be -- they are irresistibly drawn there. And they are not alone. There are hackers at computer centers all across the country. In their extreme form, they focus on nothing else. They flunk(考试不及格)out of school and lose contact with friends; they might have difficulty finding jobs, choosing instead to wander from one computer center to another. They may even decline personal cleanliness. "I remember one hacker. We literally had to carry him off his chair to feed him and put him to sleep. We really feared for his health," says a computer science professor at MIT. Computer science teachers are now more aware of the implications of this hacker phenomenon and are on the lookout for potential hackers and cases of computer addiction that are already severe. They know that the case of the hackers is not just the story of one person's relationship with a machine. It is the story of a society's relationship to the so-called thinking machines, which are becoming almost everywhere. We can learn from the passage that those at the computer center in the middle of the night are ______. A．students preparing for tests B．students using computers to finish assignments C．excellent computer science majors D．students deeply fascinated by the computer

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• How many hours earlier did Mark leave for work this morning？

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• It took my mother an hour（）a meal for us

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• A lawyer friend of mine has devoted herself to the service of humanity. Her special area is called "public interest law". Many other lawyers represent only clients who can pay high fees. All lawyers have had expensive and highly specialized training, and they work long, difficult hours for the money they earn. But what happens to people who need legal help and cannot afford to pay these lawyers' fees？

  Public interest lawyers fill this need. Patricia, like other public interest lawyers, earns a salary much below what some lawyers can earn. Because she is willing to take less money, her clients have the help they need, even if they can pay nothing at all. Some clients need legal help because stores have cheated them with faulty merchandise. Others are in unsafe apartments, or are threatened with eviction (being driven) and have no place to go. Their cases are all called "civil" cases. Still others are accused of criminal acts, and seek those public interest lawyers who handle "criminal" cases. These are just a few of the many situations in which the men and women who are public interest lawyers serve to extend justice throughout society. "A lawyer friend of mine has devoted herself to the service of humanity" means______. A. she has tried to earn her living by providing service for human beings B. she has tried to provide service to people in need out of humane consideration C. she has tried to work for the cause of law at any cost D. she has devoted herself to the public relationship in spite of loss of income What is the difference between public interest lawyers and other lawyers？ A. They have had more highly specialized training. B. Their training is much cheaper. C. They may offer help to those who can't afford to pay. D. They work long, difficult hours for the money they earn. The word "clients" in this passage means______. A. people who can pay high fees to their lawyers B. people who are very poor and can't afford to pay their lawyers C. people who have been cheated by stores or threatened with eviction D. people who needs and uses legal help from lawyers Public interest law includes______. A. civil cases only B. criminal cases only C. criminal and civil cases D. wealthy clients cases Which of the following is not a matter for a civil case？ A. A tenant is faced with eviction. B. A burglar is arrested. C. A landlord refuses to fix a dangerous staircase. D. A store sells a faulty radio.

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• Three hours（）enough for us to finish it

  A．is B．are C．has D．have

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• He has __ there for about an hour without moving.

  A.lain B.lay C.lied

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