单选题She was sent a box of chocolates along with a letter saying she was fired .

单选题We've been through some rough times together. A. short B. difficult C. long D. happy

单选题IS the Tie a Necessity? Ties, or neckties, have been a symbol of politeness and elegance in Britain for centuries. But the casual Prime Minister Tony Blair has problems with them. Reports suggest that even the civil servants may stop wearing ties. So, are the famously formal British really going to abandon the neckties? Maybe. Last week, the UK"s Cabinet Secretary Andrew Turnbull openly welcomed a tieless era. He hinted that civil servants would soon be free of the costliest 12 inches of fabric that most men ever buy in their lives. In fact, Blair showed this attitude when he had his first guests to a cocktail party. Many of them were celebrities without ties, which would have been unimaginable even in the recent past. For some more conservative British, the tie is a must for proper appearance. Earlier, Labor leader Jim Callaghan said he would have died rather than have his children seen in public without a tie. For people like Callaghan, the tie was a sign of being complete, of showing respect. Men were supposed to wear a tie when going to church, to work in the office, to a party—almost every social occasion. But today, people have begun to accept a casual style even for formal occasions. The origin of the tie is tricky. It started as something called simply a "band". The term could mean anything around a man"s neck. It appeared in finer ways in the 1630s. Frenchmen showed a love of this particular fashion statement. Their neckwear impressed Charles Ⅱ, the king of England who was exiled to France at that time. When he returned to England in 1660, he brought this new fashion item along with him. It wasn"t, however, until the late 18th century that fancy young men introduced a more colorful, flowing piece of cloth that eventually became known as the tie. Then, clubs military institutions and schools began to use colored and patterned ties to indicate the wearer"s membership in the late 19th century. After that, the tie became a necessary item of clothing for British gentlemen. But now, even gentlemen are getting tired of ties. Anyway, the day feels a bit easier when you wake up without having to decide which tie suits you and your mood.

单选题The famous athlete expressed his regret at the failure of the running race.

单选题The proud young man {{U}}values{{/U}} himself {{U}}on{{/U}} his ability in handling difficult issues.

单选题An introverted person is inclined to be moody.

单选题Caffeine Caffeine is probably the most widely used drug in the world. Humans have been consuming caffeine for hundreds of years, primarily in the form of coffee, tea, and cocoa. Habitual coffee and tea drinkers had long been observed to have a lower incidence of non- melanoma (黑色素瘤) skin cancers, although no one knew why. A recent study found that caffeine affects skin cells damaged by ultraviolet radiation, a main cause of skin cancer. Caffeine interferes with a protein that cancerous cells need to survive, leaving the damaged cells to die before they become cancerous. Drinking caffeinated coffee has also been associated with a decreased incidence of endometrial (子宫内膜的) cancer—that is, cancer of the cells lining the uterus—the strongest effect appears to be in overweight women, who are at greatest risk for the disease. Researchers believe blood sugar, fat cells, and estrogen (雌性激素) may play a role. Although the mechanism remains unknown, people who drink more than two cups of coffee or tea a day reportedly have about half the risk of developing chronic liver disease as those who drink less than one cup of coffee daily; caffeinated coffee has also been associated with lowered risk of cirrhosis (肝硬化) and liver cancer. While many of caffeine"s undesirable effects, such as elevated heart rate and blood pressure, are brief, some short-term benefits, including pain relief, increased alertness, and increased physical endurance, have also been attributed to caffeine. As a component of numerous over the counter diet pills and pain relievers, caffeine increases their effectiveness and helps the body absorb them more quickly. By constricting (收缩) blood vessels in the brain, it can alleviate headaches—even migraines (偏头痛)—and can help counter the drowsiness (眩晕) caused by antihistamines (抗组胺药). Caffeine does not alter the need for sleep, but it does offer a temporary solution to fatigue for people who need to stay alert. Research has shown that sleep deprived individuals who consumed caffeine had improved memory and reasoning abilities, at least in the short term. Studies of runners and cyclists have shown that caffeine can improve their stamina—hence its addition to energy boosting sports drinks. People who consume a lot of caffeine regularly may develop temporary withdrawal symptoms, headache being the most common, if they quit or cut back on it abruptly. Fortunately, these symptoms last only a day or two in most cases. Individuals who are more sensitive to the stimulatory side effects of caffeine may want to avoid it, but most doctors agree that the equivalent of three cups of coffee a day does not harm healthy people. There is no medical basis to give up daily caffeine and many reasons to include a moderate amount in one"s diet.

单选题We do not feel the gravitational pull of a packet of butter because

单选题Fred is second to none in maths in our class, but believe it or not, he hardly passed the last exam.

单选题Because administering the whole company, he sometimes has to work around the clock.A. adjustingB. evaluatingC. engagingD. managing

单选题William Faulkner's stories reflect his Mississippi {{U}}upbringing{{/U}}.

单选题The leaves have been swept into huge (heaps).

单选题What happened when honey badgers got used to humans around them?

单选题The Grass Is Greener at Harvard There is an underground revolution spreading across Harvard University this fall. It's occurring under the soil and involves fungi(真菌) ,bacteria, microbes(微生物) and roots, which are now fed with compost tea (混合肥料) rather than pesticides and synthetic nitrogen (合成氮). The results have so surprised university administrators that what started as a one - acre pilot project in Harvard Yard has spread organic practices through 25 acres on the campus. "Our goal is to be fully organic on the 80 acres that we maintain within the next two years. " said Wayne Carbone, Harvard's manager of landscape services. Harvard's president, Drew Gilpin Faust, who last year started a university effort to reduce greenhouse gases by 30 percent by 2016, has adopted the organic program at Elmwood, the Dresident's house on Brattle Street. Dr. Faust became interested by the effort last spring when she saw a display that the Harvard Yard Soils Restoration Project had set up outside her office. As the project proceeded, "I saw the impact, I was really excited," Dr. Faust said. "I think it's an integral part of the larger effort to advance sustainability at Harvard. " The organically grown grass on campus is now green from the microbes that feed the soil, eliminating the use of synthetic nitmgen, the base of most commercial fertilizers. No herbicides(除草剂)or pesticides are used, either. Roots reach eight inches into soil that was once so compacted the trees planted in it were dying. "At commencement(毕业典礼), rain or shine, we have 10,000 people here," Mr. Carbone said, gazing at the expanse where chairs are traditionally set in front of Memorial Church. "We get about 6,000 to 8,000 people here every day. " But the microbial activity beneath their feet has now aerated(使生气勃勃) the soil. Tree roots can breathe because they are absorbing nutrients and water. Newly planted oaks outside Mass Hall, a few steps from Harvard Square, are thriving. Soil tests show the Dresence not only of beneficial bacteria and fungi but also of the micro - organisms that feed on them, recycling nitrogen back into the soil. This dog- eat- dog(竞争激烈的) world underground also retains moisture. Thanks to these efforts, the university has reduced the use of irrigation(灌溉) by 30 percent, according to Mr. Carbone, thus saving two million gallons of water a year. And the 40 - year - old orchards at Elmwood, which have been treated with compost tea, are recovering from leaf spot(叶斑病) and apple scab(疮痂病).

单选题There is always excitement at the Olympic Games when an athlete {{U}}breaks{{/U}} a previous record of performance. A. beats B. matches C. maintains D. announces

单选题I was astonished at the news of his escape.

单选题Formal Education and Economic Growth The relationship between formal education and economic growth in poor countries is widely misunderstood by economists and politicians alike progress in both area is undoubtedly necessary for the social, political and intellectual development of these and all other societies; however, the conventional view that education should be one of the very highest priorities for promoting rapid economic development in poor countries is wrong. We are fortunate that is it, because new educational systems there and putting enough people through them to improve economic performance would require two or three generations. The findings of a research institution have consistently shown that workers in all countries can be trained on the job to achieve radical higher productivity and, as a result, radically higher standards of living. Ironically, the first evidence for this idea appeared in the United States. Not long ago, with the country entering a recessing and Japan at its pre-bubble peak. The U. S. workforce was derided as poorly educated and one of primary cause of the poor U. S. economic performance. Japan was, and remains, the global leader in automotive assembly productivity. Yet the research revealed that the U. S. factories of Honda Nissan, and Toyota achieved about 95 percent of the productivity of Japanese, because of the training that U. S. workers received on the job. More recently, while examing housing construction, the researchers discovered that illiterate, non-English speaking Mexican workers in Houston, Texas, consistently met best-practice labor productivity standards despite the complexity of the building industry"s work. What is the real relationship between education and economic development? We have to suspect that continuing economic growth promotes the development of education even when governments don"t force it. After all, that"s how education got started. When our ancestors were hunters and gatherers 10,000 years ago, they didn"t have time to wonder much about anything besides finding food. Only when humanity began to get its food in a more productive way was there time for other things. As education improved, humanity"s productivity potential, they could in turn afford more education. This increasingly high level of education is probably a necessary, but not a sufficient, condition for the complex political systems required by advanced economic performance. Thus, poor countries might not be able to escape their poverty traps without political changes that may be possible only with broader formal education. A lack of formal education, however, doesn"t constrain the ability of the developing world"s workforce to substantially improve productivity for the forested future. On the contrary, constraints on improving productivity explain why education isn"t developing more quickly there than it is.

单选题The best olive oil is obtained from olives that are harvested just after they ripen.

单选题The government is trying to do something to ______ better understanding between the two countries.A. raiseB. promoteC. riseD. develop

单选题This table is strong and durable .