【正文】 s to participate. The only _______(17) is being at least 18 years old _______(18) the time of the Games. The candidates _______(19) profiles best fit the required posts will be ________(20) a place in the Organising Committee. They must then follow a training course. Finally, the volunteers will receive their accreditation, uniform and any necessary equipment.【7】Video games have taken a lot of _______(1) lately, blamed by some for _______(2) violence and fostering sedentariness (sitting for a long time). Now the results of a new study suggest that all those hours _______(3) playing actionpacked games might have some _______(4) effects. Researchers writing today in the journal Nature report that the activity _______(5) attentionrelated visual skills.Through a series of experiments, C. Shawn Green and Daphne Bavelier of the University of Rochester determined that habitual videogame players were ______(6) able than nonplayers to focus on visually plex situations, to keep _______(7) of multiple items at once and to process fastchanging information. To rule _______(8) the possibility that their results _______(9) reflected a tendency for gamers to be people _______(10) inherently superior visual skills, the team subjected nongamers to actionvideogame training, _______(11) which they played Medal of Honor for an hour _______(12) day, 10 days in a _______(13). Meanwhile a control group was trained on Tetris, which, ________(14) Medal of Honor, requires focusing on only a single object at a ________(15). After that short training period, the Medal of Honor group exhibited _______(16) visual skills. ?_______(17) forcing players to simultaneously juggle a number of _______(18) tasks (detect new enemies, track existing enemies and avoid getting hurt, among others), actionvideogame playing pushes the limits of three _______(19) different aspects of visual attention,? the authors conclude. ?Although videogame playing may seem rather mindless,? they add, ? it is _______(20) of radically altering visual attention processing.?【8】People who learn to play an instrument may reap benefits that aren?t musical in ________(1), according to a new study. Findings _______(2) this month in the journal Neuropsychology indicate that children with training _______(3) music have better verbal memory skills than _______(4) their peers who haven?t received musical instruction.Agnes S. Chan of Chinese University in HK and her colleagues tested 90 boys ________(5) the ages of six and 15. Half of the students ________(6) to a school orchestra and had received additional musical training, ________(7) the other half and not been taught how to play _______(8) instrument. The researchers pared the students? verbal memory skills, ________(9) as recalling words from a list, and their visual memory ________(10) images. They found that boys with musical training remembered significantly more words than the ________(11) students did and retained more words after 30minute delays. What is _______(12), performance on the verbal learning tasks rose in proportion _______(13) the length of musical training. Music instruction had no ________(14) on visual memory, however.The scientists note that the improved verbal memory stems _______(15) musical training because both tasks engage the _______(16) section of the brain, the left temporal region. A _______(17) study a year after the first indicated that the effects are longlasting children who ________(18) stopped their musical training retained the verbal memory advantage gained from the instruction. In ________(19), Chan notes that music?s benefits may spill ________(20) into other areas, nothing that ?students with better verbal memory probably will find it easier to learn in school.”【9】Wele to Washington, _______(1), one of the most exciting and beautiful cities in the world. America’s _______(2) City is the seat of government as well as a city of monuments and memorials.The District of Columbia, _______(3) of culture, charm and intrigue, also has an international _______(4) in its embassies and everyday neighborhoods.________(5) from its many obvious attractions and sights, the District is known for ________(6) politicians, scandals and prominent citizens. It has some of the country?s oldest churches and has been the ________(7) for some of the world?s greatest authors and musicians. To help you find your _________(8) to the sights, we?re provided short capsules on some points of immediate ________(9). Just use the numbers on each item to help you locate the place on the map you wish to see.. CapitolOpen 9 . to 4 . Monday through Saturday ________(10) Thanksgiving, Christmas and New Year?s Day. The Capitol is ________(11) Sunday. Thirtyminute ________(12) tours depart from the Rotunda at the East Front of the Capitol, facing the Library of Congress and ________(13) Court, and begin every 30 minutes from 9:30 . to 3:30 . Monday through Saturday. Free tickets are required for the ________(14)。 the breadwinner knows that he may die by ________(4) and ________(5) his family in poverty. On the other hand, not every house is damaged by fire or every vessel lost at sea. If these persons each put a ________(6) sum of money into a pool, there will be enough to _______(7) the needs of the few who do suffer ________(8). In other words the losses of the few are met from the contributions of the _______(9). This is the basis of ________(10). Those who pay the contributions are known as ________(11) and those who administer the pool of the contributions as insurer.The ________(12) for an insurance naturally depends on how the risk is to happen as suggested ________(13) past experience. If the panies fix their premiums too ________(14), there will be more petition in their branch of insurance and they may lose _________(15). On the other hand, if they make the premiums too low, they will not have _________(16) and may even have to drop out _________