单选题 A new study suggests that the more teenagers watch television, the more likely they are to develop depression as young adults. But the extent to which TV may or may not be to blame is a question that the study leaves unanswered. The researchers used a national long-term survey of adolescent health to investigate the relationship between media use and depression. They based their findings on more than 4,000 adolescents who were not depressed when the survey began in 1995. As part of the survey, the young people were asked how many hours of television or Videos they watched daily. They were also asked how often they played computer games and listened to the radio. Media use totaled an average of 5 and one-half hours a day. More than 2 hours of that was spent watching TV. 7 years later, in 2002, more than 7 percent of the young people had signs of depression. The average age at that time was 21. Brian Primack at the University of Pittsburgh medical school was the lead author of the new study. He says every extra hour of television meant an 8 percent increase in the chances of developing signs of depression. The researchers say they did not find any such relationship with the use of other media such as movies, Video games or radio. But the study did find that young men were more likely than young women to develop depression given the same amount of media use. Doctor Primack says the study did not explore why watching TV causes depression. But one possibility, he says, is that it may take time away from activities that could help prevent depression, like sports and socializing. It might also interfere with sleep, he says, and that could have an influence. The study was just published in the Archives of General Psychiatry. In December, the journal Social Indicators Research published a study of activities that help lead to happy lives. Sociologists from the University of Maryland found that people who describe themselves as happy spend less time watching television than unhappy people. The study found that happy people are more likely to be socially active, to read, attend religious services and to vote.

单选题 国画(Chinese painting)是世界上最古老的艺术传统之一。绘画时用毛笔蘸黑墨或彩墨在纸张或丝绸上作画。根据表现手法，国画可分为写意派(the Xieyi school)和工笔派(the Gongbi school)两大类。写意派以自由表达和形式夸张为特点；工笔派则注重以精细的笔法描绘细节。山水画被公认为国画的最高形式。纵观历史。不同时期的国画都相应地反映出人们的社会意识。

单选题 Some of the world's most significant problems never hit headlines. One example comes from agriculture. Food riots and hunger make news. But the trend lying behind these matters is rarely talked about. This is the decline in the growth in yields of some of the world's major crops. A new study by the University of Minnesota and McGill University in Montreal looks at where, and how far, this decline is occurring. The authors take a vast number of data points for the four most important crops: rice, wheat, corn and soyabeans(大豆). They find that on between 24% and 39% of all harvested areas, the improvement in yields that took place before the 1980s slowed down in the 1990s and 2000s. There are two worrying features of the slowdown. One is that it has been particularly sharp in the world's most populous(人口多的) countries, India and China. Their ability to feed themselves has been an important source of relative stability both within the countries and on world food markets. That self-sufficiency cannot be taken for granted if yields continue to slow down or reverse. Second, yield growth has been lower in wheat and rice than in corn and soyabeans. This is problematic because wheat and rice are more important as foods, accounting for around haft of all calories consumed. Corn and soyabeans are more important as feed grains. The authors note that 'we have preferentially focused our crop improvement efforts on feeding animals and cars rather than on crops that feed people and are the basis of food security in much of the world'. The report qualifies the more optimistic findings of another neus paper which suggests that the world will not have to dig up a lot more land for farming in order to feed 9 billion people in 2050, as the Food and Agriculture Organisation has argued. Instead, it says, thanks to slowing population growth, land currently ploughed up for crops might be able to revert (回返) to forest or wilderness. This could happen. The trouble is that the forecast assumes continued improvements in yields, which may not actually happen.

单选题 中国的红灯笼(red lanterns)有非常悠久的历史。红灯笼已成为中国非常著名的标志。灯笼有不同的形状、大小，也有各种各样的制作方法。最常见的灯笼是红色的。红色在传统意义上象征着好运和欢乐。最早的灯笼是为了实用性而制作的。今天，尽管灯笼已失去了实用需求，但依然很受中国人欢迎。唐人街(Chinatowns)也可以看到灯笼，人们为了招揽生意，经常在店铺外悬挂灯笼。

单选题Is technology changing our brains? A new study adds to a growing body of research that says it is. According to the study, a 27 shift in how we gather information and communicate with one another has touched off an era of rapid evolution that may 28 change the human brain as we know it. The impact of technology on our brain should not come as a 29 . Professional musicians have more gray matter in brain regions 30 for planning finger movements. And athletes' brains are bulkier in areas that 31 hand-eye coordination. That's because the more time you devote to a specific activity, the stronger the neural (神经系统的) pathways responsible for executing that activity become. So it makes 32 that people who process a constant stream of digital information would have more neurons dedicated to filtering (过滤) that information. To see how the Internet might be rewiring us, the brains of 24 adults were 33 as they performed a simulated Web search, and again as they read a page of text. During the Web search, those who reported using the Internet 34 in their everyday lives showed twice as much signaling in brain regions responsible for decision-making and complex reasoning, compared with those who had 35 Internet exposure. The findings suggest that Internet use enhances the brain's 36 to be stimulated, and that Internet reading activates more brain regions than printed words. A. abundant F. limited K. scarcely B. capacity G. monitored L. sense C. control H. regularly M. stability D. dramatic I. responsible N. surprise E. immediately J. restrain O. ultimately

单选题 Directions: For this part, you are allowed 30 minutes to write a short essay on the importance of taking advantage of group brainstorming to solve problems. You should write at least 120 words but no more than 180 words.

单选题Directions:Forthispart,youareallowed30minutestowriteashortessaybasedonthepicturebelow.YoushouldstartyouressaywithabriefdescriptionofthepictureandthendiscussTheimportanceofgoodhealth.Youshouldgivesoundargumentstosupportyourviewsandwriteatleast120wordsbutnomorethan180words.'Spendmoretimeoutsidewithyourdog.Teachhimhowtothrowastickforyoutochase.'