单选题I will not {{U}}tolerate{{/U}} that sort of behavior in my class.

单选题Mr. Henley has accelerated his sale of shares over the past year.A. heldB. offeredC. increasedD. expected

单选题The old concerns lose importance and some of them vanish altogether. A. develop B. disappear C. link D. renew

单选题The park is a good place for {{U}}strollers.{{/U}}

单选题{{B}}第三篇{{/B}} {{B}}The Rising Oil Price{{/B}} Could the bad old days of economic decline be about to return? Since OPEC agreed to supply-cuts in March, the price of crude oil has jumped to almost $ 26 a barrel, up from less than $10 last December. This near-tripling of oil prices calls up scary memories of the 1973 oil shocks resulted in double-digit inflation and global economic decline. So where are the headlines warning of gloom and doom this time? The oil price was given another push up this week when Iraq suspended oil exports. Strengthening economic growth, at the dame time as winter grips the northern hemisphere, could push the price higher still in the short term. Yet there are good reasons to expect the economic consequences now to be less severe than in the 1970s. In most countries the cost of crude oil now accounts for a smaller share of the price of petrol than it did in the 1970s. In Europe, taxes account for up to four-fifths of the retail price, so even quite big changes in the price of crude have a more muted effect on pump prices than in the past. Rich economics are also less dependent on oil than they were, and so less sensitive to swings in the oil price. Energy conservation, a shift to other fuels and a decline in the importance of heavy, energy-intensive industries have reduced oil consumption. Software, consultancy and mobile telephones use far less oil than steel or car production. For each dollar of GDP (in constant prices) rich economics now use nearly 50% less oil than in 1973. The OECD estimates in its latest Economic Outlook that, if oil prices averaged $ 22 a barrel for a full year, compared with $13 in 1998, this would increase the oil import bill in rich economies by only 0.25%~0.5% of GDP. That is less than one-quarter of the income loss in 1974 or 1980. On the other hand, oil-importing emerging economies—to which heavy industry has shifted— have become more energy-intensive, and so could be more seriously squeezed. One more reason not to lose sleep over the rise in oil prices is that, unlike the rises in the 1970s, it has not occurred against the background of general commodity-price inflation and global excess demand. A sizable portion of the world is only just emerging from economic decline. The Economist’s commodity price index is broadly unchanging from a year ago. In 1973 commodity prices jumped by 70%, and in 1979 by almost 30%.

单选题For some obscure reason, the simple game is becoming very popular.

单选题There is always excitement at the Olympic Games when an athlete {{U}}breaks{{/U}} a previous record of performance.

单选题Universities usually give diplomas or certificates to students who complete course requi-rements adequately. A. responsibly B. sufficiently C. patiently D. successfully

单选题What Is a Dream? For centuries, people have wondered about the strange things that they dream about. Some psychologists say that this nighttime activity of the mind has no special meaning. Others, however, think that dreams are an important part of our lives. In fact, many experts believe that dreams can tell us about a person"s mind and emotions. Before modem times, many people thought that dreams contained messages from God. It was only in the twentieth century that people started to study dreams in a scientific way. The Austrian psychologist, Sigmund Freud, was probably the first person to study dreams scientifically. In his famous book, The Interpretation of Dreams (1900), Freud wrote that dreams are an expression of a person"s wishes. He believed that dreams allow people to express the feelings, thoughts, and fears that they are afraid to express in real life. The Swiss psychiatrist Car Jung was once a student of Freud"s. Jung, however, had a different idea about dreams. Jung believed that the purpose of a dream was to communicate a message to the dreamer. He thought people could learn more about themselves by thinking about their dreams. For example, people who dream about falling may learn that they have too high an opinion of themselves. On the other hand, people who dream about being heroes may learn that they think too little of themselves. Modern-day psychologists continue to develop theories about dreams. For example, psychologist William Domhoff from the University of California, Santa Cruz, believes that dreams are tightly linked to a person"s daily life, thoughts, and behavior. A criminal, for example, might dream about crime. Domhoff believes that there is a connection between dreams and age. His research shows that children do not dream as much as adults. According to Domhoff, dreaming is a mental skill that needs time to develop. He has also found a link between dreams and gender . His studies show that the dreams of men and women are different. For example, the people in men"s dreams are often other men, and the dreams often involve fighting. This is not true of women"s dreams. Domhoff found this gender difference in the dreams of people from 11 cultures around the world, including both modern and traditional ones. Can dreams help us understand ourselves? Psychologists continue to try to answer this question in different ways. However, one thing they agree on is this: If you dream that something terrible is going to occur, you shouldn"t panic. The dream may have meaning, but it does not mean that some terrible event will actually take place. It"s important to remember that the world of dreams is not the real world.

单选题The immense change of the city Uastonished/U every member of the conference.

单选题Jack is a Udiligent/U worker.

单选题Henry cannot resist the lure of drugs.

单选题Cell Phone Lets Your Secrets Out Your cell phone holds secrets about you. Besides the names and numbers that you"ve programmed into it, 1 of your DNA linger (遗留) on the device, according to a new study. DNA is genetic (遗传的) material 2 appears in every cell. Like your fingerprint, your DNA is 3 to you—unless you have an identical twin. Scientists today analyze DNA in blood, saliva (唾液), or hair left 4 at the scene of a crime. The results often help detectives identify 5 and their victims. Your cell phone can reveal more about you 6 you might think. Meghan J. McFadden, a scientist at McMaster University in Hamilton, Ontario, heard about a crime in which the suspect bled onto a cell phone and later dropped the 7 . This made her wonder whether traces of DNA lingered on cell phones—even when no blood was 8 . She and colleague Margaret Wallace of the City University of New York analyzed the flip-open phones (翻盖手机) of 10 volunteers. They used swabs (药签) to collect 9 traces of the users from two parts of the phone: the outside, where the user 10 it, and the speaker, which is placed at the user"s ear. The scientists cleaned the phones using a solution made mostly 11 alcohol. The aim of washing was to remove all detectable traces of DNA. The owners got their phones back for another week. Then the researchers 12 the phones and cleaned each phone once more. The scientists discovered DNA that 13 to the phone"s speaker on each of the phones. Better samples were collected from the outside of each phone, but those swabs also picked up DNA that belonged to other people who had apparently also 14 the phone. Surprisingly, DNA showed up even in swabs that were taken immediately after the phones were scrubbed. That suggests that washing won"t remove all traces of 15 from a criminal"s device. So cell phones can now be added to the list of clues that can clinch (确定) a crime-scene investigation.

单选题Penicillin was discovered {{U}}by chance{{/U}} in 1928.

单选题I will draft a letter for you.

单选题South Carolina’s mineral resources are abundant, but not all of them can be {{U}}lucratively{{/U}} mined.

单选题{{B}}第三篇{{/B}} {{B}}Florida Hit by Cold Air Mass{{/B}} In January, 2003, the eastern two thirds of the United States was at the mercy of a bitterly cold air mass that has endangered Florida's citrus trees, choked 3 northern harbors with ice and leftbewildered residents of North Carolina's Outer Banks digging out of up to a foot of snow. The ice chill deepened as temperatures fell to the single digits in most of the South, with an unfamiliar dip below the freezing mark, as far South as parts of interior South Florida. Temperatures in Florida plunged, with West Palm Beach dropping to a record low of 2 degrees. "We couldn't believe how cold it was," said Martin King, who arrived this week in Orlando from England "We brought shorts, T-shirt, and I had to go out and buy another coat." The temperature plunge posed a threat to Florida's USS 9.1 billion-a-year citrus crop, more of which is still on the trees. Growers were hurrying to harvest as much of the fruit as possible before it was damaged by cold. "Time is of the essence in getting fruit to the plant," said Tom Rogers, a citrus grower who expected to see damage to oranges and grapefruit at that time. In Florida, Governor Jeb Bush signed an emergency order to eliminate the weight limit on trucks so citrus growers could get as much fruit to market as possible. Casey Pace, a spokeswoman for Florida Citrus Mutual, said growers had sprayed trees with sprinklers, which created a layer of ice and helped maintain a temperature near freezing. Citrus trees are considered in danger of damage if the temperature drops below minus 2 degrees Celsius for four hours or more. Snow ranging from a dusting to up to 30 centimeters blanketed the Carolinas, Tennessee and parts of Virginia. citrus n. 柠檬，柑橘；柑橘属果树 bewilder v. 使迷惑；使为难；……弄糊涂 sprinklern. 洒水器；洒水手 Celsius adj.摄氏的 shorts n. 宽松运动裤；男式短衬裤

单选题It took me two hours to {{U}}figure out{{/U}} how to do it.

单选题Mind-reading Machine A team of researchers in California has developed a way to predict what kinds of objects people are looking at by scanning what's happening in their brains. When you look at something, your eyes send a signal about that object to your brain. Different regions of the brain process the information your eyes send. Ceils in your brain called neurons are responsible for this processing. The fMRI (functional Magnetic Resonance Imaging) brain scans could generally match electrical activity in the brain to the basic shape of a picture that someone was looking at. Like cells anywhere else in your body, active neurons use oxygen. Blood brings oxygen to the neurons, and the more active a neuron is, the more oxygen it will consume. The more active a region of the brain, the more active its neurons, and in turn, the more blood will travel to that region. And by using fMRI, scientists can visualize which parts of the brain receive more oxygen rich blood and therefore, which parts are working to process information. An fMRI machine is a device that scans the brain and measures changes in blood flow to the brain. The technology shows researchers how brain activity changes when a person thinks, looks at something, or carries out an activity like speaking or reading. By highlighting the areas of the brain at work when a person looks at different images, fMRI may help scientists determine specific patterns of brain activity associated with different kinds of images. The California researchers tested brain activity by having two volunteers view hundreds of pictures of everyday objects, like people, animals, and fruits. The scientists used an fMRI machine to record the volunteers' brain activity with each photograph they looked at. Different objects caused different regions of the volunteers' brains to light up on the scan, indicating activity. The scientists used this information to build a model to predict how the brain might respond to any image the eyes see. In a second test, the scientists asked the volunteers to look at 120 new pictures. Like before, their brains were scanned every time they looked at a new image. This time, the scientists used their model to match the fMRI scans to the image. For example, if a scan in the second test showed the same pattern of brain activity that was strongly, related to pictures of apples in the first test, their model would have predicted the volunteers were looking at apples.

单选题Among the men and women who {{U}}reshaped{{/U}} the American working class during the early 1900s, there were many who were not members of labor unions.