单选题Passage One For the first time, stem cells purified from fat have been used to heal an injury in a living animal. Michael Longaker of Stanford University in California and his team showed in mouse experiments that so-called adipose derived adult stromal (ADAS) cells purified from a rodent's belly fat could be coaxed to heal a skull fracture too large to mend by itself. The power of ADAS cells to transform into bone, cartilage and even neurons has been studied for years in test tubes. But Jeffrey Gimble, who studies human ADAS cells at Louisiana State University in Baton Rouge says Longaker's report is an important step forward. "Actually repairing a defect in an animal model had never been done. This is an excellent study." If the same technique works in humans, these cells could be coaxed to mend broken bones and correct other defects in tens of thousands of surgical procedures each year in which bone grafts and prosthetics are now necessary. Longaker's group tested the ability of ADAS cells to heal four-millimetre-long fractures surgically-induced in the skulls of mice. In 12 weeks, the cells filled 70 to 90 per cent of the defects, while untreated animals had only unorganized bone formation in less than 10 per cent of the fractures. No extreme genetic manipulation or treatment of the cells was necessary. ADAS cells began manufacturing bone when they were simply laid onto a biodegradable polymer that contained apatite, a compound that naturally occurs in bone. Furthermore, the ADAS cells performed as well as bone marrow stromal cells, which would seem to be more natural architects of bone. It remains to be seen whether human ADAS cells will build bone as effectively. But researchers are excited about the prospects. Human bone marrow stromal cells are already being used in clinical trials as sources of skeleton-building material, but the ADAS cells may have some significant advantages. Longaker reports that ADAS cells grow seven times faster than the bone marrow cells in the laboratory. And it is relatively easy to harvest more than a litre of fat tissue, even from patients who are not obese. Bone marrow is much less plentiful and must be removed in a painful surgical procedure. Of course liposuction itself is not a pleasant operation. But according to the American Society of Plastic Surgeons, more than 300,000 people volunteered to have the procedure in 2003 simply for cosmetic reasons. "If the procedure was the first step to healing broken bones or replacing other tissue its popularity could only grow," says Gimble. "Just think of that./

单选题His father prefers that he ______ a different university. A. attends B. attended C. must attend D. attend

单选题 Passage 5 With 950 million people, India ranks second to China among the most populous countries. But since China {{U}}(1) {{/U}} a family planning program in 1971, India has been closing the gap. Indians have reduced their birth rate but not nearly {{U}}(2) {{/U}} the Chinese have. If current growth rates continue, India's population will pass China's around the year 2028 at about 1.7 billion. Should that happen, it won't be the {{U}}(3) {{/U}} of the enlightened women of Kerala, a state in southern India. {{U}}(4) {{/U}} India as a whole adds almost 20 million people a year, Kerala's population is virtually stable. The reason is no mystery: nearly two-thirds of Kerala women practice birth control, compared with about 40% in the entire nation. The difference {{U}}(5) {{/U}} the emphasis put on health programs, including birth control, by the state authorities, {{U}}(6) {{/U}} in 1957 became India's first elected Communist government. And an educational tradition and matrilineal (母系的) customs in parts of Kerala help girls and boys get equally good schooling. While one in three Indian women is {{U}}(7) {{/U}},90% of those in Kerala can read and write. Higher literacy rates {{U}}(8) {{/U}} family planning. "Unlike our parents, we know that we can do more for our children if we have fewer of them," says Laial Cherian, 33, who lives in the village of Kudamaloor. She has limited herself {{U}}(9) {{/U}} three children--one below the national {{U}}(10) {{/U}} of four. That kind of restraint will keep Kerala from putting added pressure on world food supplies.

单选题They usually have less money at the end of the month than ______ at the beginning. A. which is B. which was C. they do D. it is

单选题 While there's never a good age to get cancer, people in their 20s and 30s can feel particularly isolated. The average age of a cancer patient at diagnosis is 67. Children with cancer often are treated at pediatric (小儿科的) cancer centers, but young adults have a tough time finding peers, often sitting side-by-side during treatments with people who could be their grandparents. In her new book Crazy Sexy Cancer Tips, writer Kris Carr looks at cancer from the perspective of a young adult who confronts death just as she's discovering life. Ms. Carr was 31 when she was diagnosed with a rare form of cancer that had generated tumors on her liver and lungs. Ms. Carr reacted with the normal feelings of shock and sadness. She called her parents and stocked up on organic food, determined to become a "full-time healing addict." Then she picked up the phone and called everyone in her address book, asking if they knew other young women with cancer. The result was her own personal “cancer posse”: a rock concert tour manager, a model, a fashion magazine editor, a cartoonist and a MTV celebrity, to name a few. This club of "cancer babes" offered support, advice and fashion tips, among other things. Ms. Carr put her cancer experience in a recent Learning Channel documentary, and she has written a practical guide about how she coped. Cancer isn't funny, but Ms. Carr often is. She swears, she makes up names for the people who treat her (Dr. Fabulous and Dr. Guru), and she even makes second opinions sound fun ("cancer road trips," she calls them). She leaves the medical advice to doctors, instead offering insightful and practical tips that reflect the world view of a young adult. "I refused to let cancer ruin my party," she writes. "There are just too many cool things to do and plan and live for." Ms. Carr still has cancer, but it has stopped progressing. Her cancer tips include using time- saving mass e-mails to keep friends informed, sewing or buying fashionable hospital gowns so you're not stuck with regulation blue or gray and playing Gloria Gaynor’s "I Will Survive" so loud your neighbors call the police. Ms. Carr also advises an eyebrow wax and a new outfit before yon tell the important people in your life about your illness. "People you tell are going to cautiously and not so cautiously try to see the cancer, so dazzle them instead with your miracle," she writes. While her advice may sound superficial, it gets to the heart of what every cancer patient wants: the chance to live life just as she always did, and maybe better.

单选题 Most children with healthy appetites are ready to eat almost anything that is offered them and a child rarely dislikes food {{U}}(31) {{/U}} it is badly cooked. The way a meal is cooked and served is most important and an attractively served meal will often improve a child's appetite. Never ask a child {{U}}(32) {{/U}} he likes or dislikes a food and never discuss likes and dislikes in front of him or allow {{U}}(33) {{/U}} else to do so. If the father says he hates fat meat or the mother refuses vegetables, in the child's hearing he is {{U}}(34) {{/U}} to copy this procedure. Take it {{U}}(35) {{/U}} granted that he likes everything add he probably will. Nothing healthful should be omitted from the meal because of a supposed dislike. At meal times it is a good {{U}}(36) {{/U}} to give a child a small portion and let him come back for a second helping rather than give him as {{U}}(37) {{/U}} as he is likely to eat all at once. Do not talk too much to the child {{U}}(38) {{/U}} meal times, but let him get on with his food; and do not {{U}}(39) {{/U}} him to leave the table immediately after a meal or he will soon learn to swallow his food so he can hurry back to his toys. Under {{U}}(40) {{/U}} circumstances must a child be coaxed (哄骗) or forced to eat.

单选题______ after a long walk, Harry called and said he couldn't come. A. Having worn out B. Be worn out C. To wear out D. Worn out

单选题Working far away from home, Jerry had to ______ from downtown to his office every day.

单选题John is the only One of the students who ______ to France.

单选题Directions: For each blank in the .following passage, choose the best answer from the choices giv- en below. Mark your answer on the ANSWER SHEET by drawing with a pencil a short bar across the corresponding letter in the brackets. Until recently most historians spoke very critically of the Industrial Revolution. They {{U}} {{U}} 1 {{/U}} {{/U}}that in the long run industrialization greatly raised the standard of living for the {{U}} {{U}} 2 {{/U}} {{/U}}man. But they insisted that its {{U}} {{U}} 3 {{/U}} {{/U}}results during the period from 1740 to 1840 were widespread poverty and misery for the {{U}} {{U}} 4 {{/U}} {{/U}}of the English population. {{U}} {{U}} 5 {{/U}} {{/U}}con- trast, they saw in the preceding hundred years from 1640 to 1740, when England was still a{{U}} {{U}} 6 {{/U}} {{/U}}agricultural country, a period of great abundance and prosperity. This view, {{U}} {{U}} 7 {{/U}} {{/U}}, is generally thought to be wrong. Specialists {{U}} {{U}} 8 {{/U}} {{/U}}history and economics, have {{U}} {{U}} 9 {{/U}} {{/U}}two things: that the period from 1640 to 1740 was{{U}} {{U}} 10 {{/U}} {{/U}}by great poverty, and that industrialization certainly did not worsen and may have actually im- proved the conditions for the majority of the populace.

单选题His remarks left me ______ about his real purpose. A. wonder B. wondering C. wondered D. to wonder

单选题Friend A: Just call me dad! My wife and I had our first baby. Friend B:______.

单选题The human body is composed of organs, each ______ a definite job to do.

单选题I managed to talk down the price and bought the coat ______ the discount of 20 percent. A. for B. with C. on D. at

单选题Directions: For each blank in the following passage, choose the best answer from the choices given below. Mark your answer on the Answer Sheet by drawing with a pencil a short bar across the corresponding letter in the brackets. Ireland is the best place in the world to live for 2005, {{U}} {{U}} 1 {{/U}} {{/U}}a life quality ranking that appeared in Britain's Economist magazine last week. The ambitious {{U}} {{U}} 2 {{/U}} {{/U}}to compare happiness levels around the world is based on the principle that wealth is not the only {{U}} {{U}} 3 {{/U}} {{/U}}of human satisfaction and well-being. The index of 111 countries uses {{U}} {{U}} 4 {{/U}} {{/U}}on incomes, health, unemployment, climate, political stability, job security equality between men and women as well as what the magazine calls "freedom, family and community life". Despite the bad weather troubled health service, traffic problems, and the high cost of living, Ireland scored an impressive 8.33 points {{U}} {{U}} 5 {{/U}} {{/U}}10. That put it well ahead of second-place Switzerland, which managed 8.07. Zimbabwe (津巴布韦), troubled by political insecurity and hunger, is rated the lowest, {{U}} {{U}} 6 {{/U}} {{/U}}only 3.89 points. "Although rising incomes and increased individual choices in developed countries are {{U}} {{U}} 7 {{/U}} {{/U}}valued," the report said, "some of the factors associated with {{U}} {{U}} 8 {{/U}} {{/U}}such as the breakdown in traditional institutions and family values in part take away from a positive impact. "Ireland wins because it successfully combines the most desirable elements of the new—the fourth highest gross domestic product per head in the world in 2005, low unemployment, political {{U}} {{U}} 9 {{/U}} {{/U}}—with the preservation of certain warm elements of the old, such as {{U}} {{U}} 10 {{/U}} {{/U}}family and community life. "

单选题Interviewer: Hi, Christopher, what do you do in your free time? ______ ? Christopher: Well, I have a lot of hobbies. I like to read, and I like to work on computers.

单选题How many significant demographic changes ever occurred in the past one million years?

单选题Tom: Shall we try Pizza Hut tonight?Rachel: Sure. ______

单选题Firefighters are often asked to speak to school and community groups about the importance of fire safety, particularly fire prevention and detection. Because smoke detectors reduce the risk of dying in a fire by half, firefighters often provide audiences with information on how to install these protective devices in their homes. Specifically, they tell them these things. A smoke detector should be placed on each floor of a home. While sleeping, people are in particular danger of an emergent fire, and there must be detector outside each sleeping area. A good site for a detector would be a hallway that runs between living spaces and bedrooms. Because of the dead-air space that might be missed by hot air bouncing around above a fire, smoke detector should be installed either on the ceiling at least four inches from the nearest wall, or high on a wall at least four, but no further than twelve, inches from the ceiling. Detectors should not be mounted near windows, entrances, or other places where drafts (过堂风) might direct the smoke away from the unit. Nor should they be placed in kitchens and garages, where cooking and gas fumes are likely to cause false alarms.

单选题 It is wise to remember that you do not have to buy anything from any salesperson. You ought to buy only those things you really need or want and can {{U}}(31) {{/U}}. Try not to let your personal feelings about the salesperson {{U}}(32) {{/U}} you to make a purchase. Remember that you are entitled to ask a salesperson any question you wish {{U}}(33) {{/U}} the product or service, and you are entitled to get a clear, complete {{U}}(34) {{/U}}. You call tell the salesperson you want to think about the matter, for a few days, {{U}}(35) {{/U}} that you want to talk to other people who have purchased the product or service. You can walk {{U}}(36) {{/U}} from a salesperson without a polite end to the conversation. If a salesperson telephones you, you do not have to listen to the person's entire "lecture" or respond to it in a friendly way. You can simply interrupt the person and state that you are not interested in the product or service. You can simply {{U}}(37) {{/U}} the telephone without saying anything. There are, of course, many salespeople who are genuinely interested in assisting you and in {{U}}(38) {{/U}} you reasonable products and prices. If you are in {{U}}(39) {{/U}} about the wisdom of a particular purchase, you might want to{{U}} (40) {{/U}}another person who has had experience with the product or the service that interests you. If you receive unwanted goods in the mail, you are not obligated to pay for it.