单选题Sleep is a funny thing. We're taught that we should get seven or eight hours a night, but a lot of us get by just fine on less, and some of us actually sleep too much. A study out of the University of Buffalo reported that people who routinely sleep more than eight hours a day and are still tired are nearly three times as likely to die of stroke--probably as a result of an underlying disorder that keeps them from sleeping soundly. Doctors have their own special sleep problems. Residents are famously short of sleep. It is not unusual for them to work 40 hours in a row without rest. They are not in the least worried about it, confident they can still deliver the highest quality of medical care. But an article in the Journal of the American Medical Association points out that in the morning after 24 hours of sleeplessness, a person s motor performance is comparable to that of someone who is drunk. Curiously, surgeons who believe that operating under the influence of alcohol is grounds for sacking often don't think twice about operating without enough sleep. "I could tell you horror stories," says Jaya Agrawal, president of the American Medical Student Association, Which runs a website for residents. Some are terrifying. "I was operating after being up for over 36 hours," one writes. "I literally fell asleep standing up and nearly planted my face into the wound." "Practically every surgical resident I know has fallen asleep at the wheel driving home from work." writes another. "I know of three who have hit parked cars. Another hit a ' Jersey gate' on the New Jersey Expressway, going 105km/h." "Your own patients have become the enemy," writes a third, because they are "the one thing that stands between you and a few hours of sleep." The U.S. controls the hours of pilots and truck drivers. But until such a system is in place for doctors, patients are on their own. If you're worded about the people treating you or a loved one, you should feel free to ask how many hours of sleep they have had and if more rested staffers are available.

单选题Mr. Baker liked shooting very much but he was never good at it. A month ago some of his friends visited him in his house and saw a new target (靶子) which Baker had put several days before in his garden. His friends went nearer and looked at this beautiful target. There was a hole right in the middle of the target. When they asked who had shot the target, Baker said he had. They all laughed and said, "How far away were you, Baker? Two feet?" But Baker said he was fifty yards (码) away. Then Mr. Baker's wife explained about the hole in the middle. She said, "Baker went to a shop and bought a very big piece of wood. He brought it home in a car, put it in the garden and shot at it from fifty yards away. Then he drew a target round the hole and cut the wood./

单选题{{B}}Text 3{{/B}} The technology of the North American colonies did not differ strikingly from that of Europe, but in one respect, the colonists enjoyed a great advantage．Especially by comparison with Britain，Americans had a wonderfully plentiful supply of wood． The first colonists did not, as many people imagine, find an entire continent covered by a continuous forest．Even along the Atlantic seaboard, the forest was broken at many points．Nevertheless, all sorts of fine trees abounded, and through the early colonial period, those who pushed westward encountered new forests．By the end of the colonial era, the price of wood had risen slightly in eastern cities, but wood was still extremely abundant． The availability of wood brought advantages that have seldom been appreciated． Wood was a foundation of the economy．Houses and all manner of buildings were made of wood to a degree unknown in Britain．Secondly, wood was used as a fuel for heating and cooking．Thirdly, it was used as the source of important industrial compounds, such as potash, an industrial alkali; charcoal, a component of gunpowder, and tannic acid, used for tanning leather． The supply of wood conferred advantages but had some negative aspects as well． Iron at that time was produced by heating iron ore with charcoal．Because Britain was so stripped of trees，she was unable to exploit her rich iron mines．But the American colonies had both iron ore and wood；iron production was encouraged and becamesuccessful. However, when Britain developed coke smelting, the colonies did not follow suit because they had plenty of wood and besides, charcoal iron was stronger than coke iron．Coke smelting led to technological innovations and was linked to the emergence of the Industrial Revolution．In the early nineteenth century, the former colonies lagged behind Britain in industrial development because their supply of wood led them to cling to charcoal iron．

单选题That afternoon Molly almost danced along the street, as she walked home with her father from the station. They had seen Mrs. Gibson and Cynthia off to London. She wished her step - mother would take herself off to London much more often. "Well now, Dad." she said, "I'm going to have you all to my- self for a whole week. You must be very obedient." "I hope you aren' t going to boss me, Molly. You' re walking me out of breath already. We mustn' t pass Mrs. Goodmays in our hurry." They crossed the street to speak to Mrs. Goodmays, one of the doctor' s patients. "We' ve just been seeing my wife and her daughter off to London. They've gone up for a week." "Dear me, to London, and only for a week!" said Mrs. Goodmays, with surprise. "It seems hardly worth the packing. It'll be lonely for you, Molly, without your stepsister." "Yes," said Molly, suddenly feeling as if she ought to have taken this view of the case. "I' 11 miss Cynthia." "And you, Dr. Gibson, I hope you won' t feel like widower once again. You must come and have supper with me one evening. What about Tuesday?" Dr. Gibson felt a sharp blow on his leg from the toe of Molly' s shoe, but even so he accepted the invitation, much to the old lady' s satisfaction. A moment later Molly said to him, "How could you go and waste one of our precious evening! We' ve only got five now. I' ve been planning all sorts of things for us to do tonight." "What sort of things'?." "Oh, I don' t know. Things you used to like." She looked at him boldly. "Forbidden things now." Her father's eyes lit up, but his face remained serious. "I'm not going to be pulled down, Molly. With hard work and sensible guidance I' ye reached a very fair height of civilized behavior, and there I' m going to stay." "Oh, no, you' re not. We' re having bread and cheese for sup per tonight, in armchairs in front of the TV ! And you shall wear your dressing - gown at breakfast tomorrow--and every morning for a week ! And you shall read the paper at the dining-table f That' s only a start. I haven' t finished by a long way yet./

单选题What'stheairportlike?A.Ahotel.B.Amarket.C.Amadhouse.D.Ahospital.

单选题"A buyer will get something for nothing "in Paragraph 2 most probably means that______.

单选题What is the probable relationship between the two speakers?

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单选题Questions 23—25 are based on the following conversation. You now have 15 seconds to read the questions 23—25.

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单选题The police______running after the thief. [A] am [B] is [C] are