单选题I spent ages trying to fix it, but gave up {{U}}in despair{{/U}}.

单选题As a writer, he turned out three novels that year.

单选题The policemen acted quickly because lives were at stake .

单选题Happiness A proverb allegedly (据说) from ancient China was widely spread in the West: "If you want to be happy for a few hours, go to get drunk; if you want the happiness to last three years, get married; if you want a lifetime happiness, take up gardening. " The reason for the last option is this: Gardening is not only useful; it helps you to identify yourself with nature, and thus brings you new joy each day besides improving your health. A research of a US university that I"ve read gives a definition of happiness as what makes a person feel comfortably pleased. To put it specifically, happiness is an active state of mind where one thinks one"s life is meaningful, satisfactory and comfortable. This should be something lasting rather than transitory. Lots of people regard it the happiest to be at leisure. But according to the study, it is not a person with plenty of leisure but one at work that feels happy, especially those busy with work having little time for leisure. Happiness does not spell gains one is after but a desire to harvest what one is seeking for. People often do not cherish what they already have but yearn for what they cannot get. That is somewhat like a man indulging in dreams of numerous lovers while reluctant to settle down with the woman beside him. Happiness is a game balancing between two ends—what one has and what one wishes for, i. e. , one"s dream and the possibility to realize it. The study comes to this conclusion: A happy man is one who aims high but never forgets his actual situation; one who meets challenges that tap his ability and potentiality; one who is proud of his achievements and the recognition given to him. He has self-respect and self-confidence; treasures his own identity and loves freedom. He is sociable and enjoys wide-range communication with others; he is helpful and ready to accept assistance. He knows he is able to endure sufferings and frustrations; he is sensible enough to get fun from daily chores. He is a man capable of love and passion.

单选题She found me very dull. A. dirty B. sleepy C. lazy D. boring

单选题It was not until the war with Russia that Nightingale

单选题They have the competence to take this job. A. possibility B. reality C. capacity D. probability

单选题She could fix the machine without referring to the instructions.A. understandingB. observingC. consultingD. obtaining

单选题I propose that we discussed this at the next meeting.

单选题The League of Women Voters is a nonpartisan organization that promotes informed active public participation in government.

单选题Smoking Can Increase Depressive Symptoms in Teens While some teenagers may puff on cigarettes to "self-medicate" against the blues, scientists at the University of Toronto and the University of Montreal have found that smoking may actually (51) depressive symptoms in some teens. "This observational study is one of the few to examine the perceived (52) benefits of smoking among teens," says lead researcher Michael Chaiton, a research associate at the Ontario Tobacco Research Unit of the University of Toronto. " (53) cigarettes may appear to have self-medicating (54) or to improve mood, in the long term we found that teens who started to smoke reported higher depressive symptoms." As part of the study, some 662 high school teenagers completed up to 20 questionnaires (55) their use of cigarettes to affect mood. Secondary schools were selected to provide a mix of French and English participants, urban and rural schools, and schools (56) in high, moderate and low socio-economic neighbourhoods. Participants were divided into three (57) : never smokers; smokers who did not use cigarettes to self-medicate, improve mood or physical (58) ; smokers who used cigarettes to self-medicate. Depressive symptoms were measured using a scale that asked how felt too fired to do things: had (59) going to sleep or staying (60) ; felt unhappy, sad, or depressed; felt hopeless about the future; felt vexed, antsy or tense; and worried too much about things. "Smokers who used cigarettes as mood (61) had higher risks of elevated depressive symptoms than teens who had never smoked," says co-researcher Jennifer O'Loughlin, a professor at the University of Montreal Department of Social and Preventive Medicine. "Our study found that teen smokers who reported emotional benefits from smoking are at higher risk of (62) depressive symptoms." The (63) between depression and smoking exists (64) among teens that use cigarettes to feel better. "It's (65) to emphasize that depressive symptom scores were higher among teenagers who reported emotional benefits from smoking after they began to smoke," says Dr. Chaiton.

单选题We had a long conversation about her parents. A. speech B. question C. talk D. debate

单选题It was obvious that she was not going home.A. probableB. necessaryC. possibleD. evident

单选题Many people were {{U}}injured{{/U}} during the storm.

单选题It is absurd to go out in such terrible weather.

单选题As soon as Linda went into the department that sold raincoats, she sensed there was something unusual in the atmosphere. First of all, there was a salesman there and not a saleswoman. That was very unusual in the women's coat department. The salesman asked if he could be of any help. But when she said she was just looking he did not seem to be listening. He (lid not look very much like a salesman, either. A second later a raincoat caught her eye. Site asked him a question about it. He did not even hear her at first. She asked again. She wanted to know if he had any coats like it with a detachable (可分离的) lining. He did not seem to understand what a detachable lining was. She explained. Then she went on looking. She noticed that the salesman seemed to be watching another customer in the department all the time. The other customer, a middle-aged woman, left the department. The salesman immediately went to the phone and told somebody on the other end that the woman had gone and had definitely taken two leather belts without paying for them. Then he turned to Linda and explained that he was not a salesman at all but a store detective. Later, Linda read in the paper that a woman had been arrested for stealing some belts front a department store, or, in other words, for shoplifting.

单选题Scott seized the opportunity to present his proposal to the director. A. realized B. grasped C. rendered D. delivered

单选题Virus Linked to Prostate (前列腺) Tumours The researchers from the University of Utah and Columbia University medical schools found the virus in 27% of the 200 cancerous prostates they looked at. They say it was associated with more aggressive tumours and found in only 6% of non - cancerous prostates. The finding raises the prospect of one day producing a vaccine to protect against prostate cancer. This is the first report to link XMRV (Xenotropic murine leukaemia virus--related virus) to human cancers. XMRV is a retrovirus like HIV which works by inserting a copy of its own DNA into the chromosomes (染色体) of a cell they infect. When this occurs to a gene that regulates cell growth, it can disrupt the normal development of the cell. Dr Helen Rippon, Head of Research Management at The Prostate Cancer Charity, said the research was intriguing (吸引人的) but posed several key questions about the role the infection plays in prostate cancer. He said: " Around the world, extensive work is being undertaken to identify risk factors for prostate cancer which will enable treatments and tests for the disease to be refined. " "It is critically important to identify key triggers of prostate cancer to improve early detection of the disease in men with potentially life threatening prostate cancer. " XMRV is known to cause leukemia (白血病) and other tumours in animals. Dr Ila Singh, who led the study from the pathology department at the University of Utah, said: "We still don't know that this virus causes cancer in people, but that is an important question we are going to investigate. " Dr Chris Parker, Cancer Research UK' s prostate cancer expert at the Institute of Cancer Research said: "This exciting study raises the possibility that the virus might contribute to the development of some prostate cancers. " "In the future, if it turns out to he true, then we, could speculate about the possibility of vaccination to protect against prostate cancer, similar to the approach now used to prevent cervical cancer (子宫颈癌). /

单选题Which of the following is NOT mentioned as a possible cure for negative stress?

单选题 Beyond the Pap Scientists have known for some time that virtually all cases of cervical cancer are triggered by a family of viruses called human papillomavirus, or HPV. Most women who become infected with HPV are able to shake off the virus and suffer no apparent long-term consequences to their health. But a few women develop a persistent infection that can, for reasons that are not entirely clear, eventually lead to cancerous changes in the cervix. Now researchers at the Digene Corp. of Beltsville, Maryland, have developed a test that detects an active HPV infection by looking for its genetic byproducts in the vagina. The HPV test was better than the standard Pap test at finding cervical cancer at any stage, according to two studies published this month in the Journal of the American Medical Association. So far, so good. Unfortunately, the test's false-positive rate—how often it indicated that there was a problem when none existed—was almost twice as high as that for the Pap smear. In these cases, a biopsy of the woman's cervix showed no sign of disease. And that's the crux of the problem. How many women should undergo what is, when it comes right down to it, unnecessary treatment to find a few more cases of cervical cancer? Shouldn't health officials focus instead on making sure that more women undergo regular Pap-smear examinations? After all, Pap smears, though far from perfect, have helped dramatically lower the death toll from cervical cancer, taking it from the No.1 cause of death due to cancer in American women to the 10th. Complicating matters is the fact that HPV is a very common infection. In some parts of the US as many as half of all women under age 35 have an active case. Yet 99 out of 100 women who are HPV-positive will never get cervical cancer, estimates Dr. Joanna Cain, vice president of the American College of Obstetricians and Gynecologists. "If those 99 women live their lives as if they're going to develop cancer," she says, "we're not necessarily doing them any good." At present, the HPV test is approved in the US only to help resolve ambiguous results from a Pap-smear test. Many gynecologists believe that HPV will eventually replace the Pap. But they're not willing to abandon it without a lot more detailed information and neither should you.