单选题Many theories concerning the causes of juvenile delinquency ( crimes committed by young people) focus either on the individual or on society as the major contributing influence. Theories (21) on the individual suggest that children engage in criminal behavior (22) they were not sufficiently penalized for previous misdeeds or that they have learned criminal behavior through (23) with others. Theories focusing on the role of society suggest that children commit crimes in (24) to their failure to rise above their socioeconomic status, (25) as a rejection of middle-class values. Most theories of juvenile delinquency have focused on children from disadvantaged families, (26) the fact that children from wealthy homes also commit crimes. The latter may commit crimes (27) lack of adequate parental control. All theories, however, are tentative and are (28) to criticism. Changes in the social structure may indirectly (29) juvenile crime rates. For example, changes in the economy that (30) to fewer job opportunities for youth and rising unemployment (31) make gainful employment increasingly difficult to obtain. The resulting discontent may in (32) lead more youths into criminal behavior. Families have also (33) changes these years. More families consist of one-parent households or two working parents; (34) , children are likely to have less supervision at home (35) was common in the traditional family structure.

单选题The peach tree they planted when they got married began to______fruit last year.

单选题When imaginative men turn their eyes towards space and wonder whether life exists in any part of it, they may cheer themselves by remembering that life need not resemble closely the life that exists on Earth. Mars looks like the only planet where life like ours could exist, and even this is doubtful. But there may be other kinds of life based on other kinds of chemistry, and they may multiply on Venus or Jupiter. At least we cannot prove at present that they do not. Even more interesting is the possibility that life on other planets may be in a more advanced state of evolution. Present-day man is in a peculiar and probably temporary stage. His individual units retain a strong sense of personality. They are, in fact, still capable under favorable circumstances of leading individual lives. But man"s societies are already sufficiently developed to have enormously more power than the individuals have. It is not likely that this transitional situation will continue very long on the evolutionary time scale. Fifty thousand years from now man"s societies may have become so close-knit that the individuals retain no sense of separate personality. Then little distinction will remain between the organic parts of the multiple organisms and the inorganic parts (machines) that have been constructed by it. A million years further on man and his machines may have merged as closely as the muscles of the human body and the nerve cells that set them in motion. The exploration of space should be prepared for such a situation. If they arrive on a foreign planet that has reached an advanced stage (and this is by no means impossible), they may find it being inhabited by a single large organism composed of many closely cooperating units. The units may be "secondary" —machines created millions of years ago by a previous form of life and given the will and ability to survive and reproduce. They may be built entirely of metals and other durable materials. If this is the case, they may be much more tolerant of their environment, multiplying under conditions that would destroy immediately any organism made of carbon compounds and dependent on the familiar carbon cycle. Such creatures might be relics of a past age, many millions of years ago, when their planet was favorable to the origin of life, or they might be immigrants from a favored planet.

单选题______is the study of psychological aspect of language.

单选题Any troop of wild animals should be approached warily.

单选题The______workroom has not been used in years.

单选题Life really should be one long journey of joy for children born with a world of wealth at their feet. Internationally famous child doctor Robert Coles is the world"s top expert on the influence of money on children. He has written a well-known book on the subject The Privileged Ones, and his research shows that too much money in the family can cause as many problems as too little. "Obviously there are certain advantages to being rich," says the 53-year-old doctor, "such as better health, education and future work prospects. But most important is the quality of family life. Money can"t buy love." It can buy a lot of other things, however, and that"s where the trouble starts. Rich kids have so much to choose from that they often become confused. Over-indulgence (娇惯) by their parents can make them spoilt. They tend to travel more than other children, from home to home and country to country, which causes feelings of restlessness. "But privileged children do have a better sense of their positions in the world," adds Mr. Coles, "and they are more self-assured. The rich children inherit the property from their parents and enjoy a high income. So money will never be one of their problems. However, they will have a sense of isolation," warns Dr. Coles, "and they could suffer from the hardship of not being able to deal with the everyday world because they will never really be given the chance. Everything they have achieved is because of an accident of birth. There can be no tremendous inner satisfaction about that." Today"s wealthy parents perhaps realize their riches can be more of a heavy load than a happiness to their children. So the first thing for them to consider is to ensure that their families are as rich in love as they are in money.

单选题A: We came so close, really. We almost won that game!B: ______. A. There, there. B. There's no use crying over spilt milk. C. You guys were superb. D. I couldn't care less.

单选题Jane: Hello Sally. Fancy meeting you here!Sally: Hello, Jane. Haven't Seen you for a long time. You've got married, haven't you?Jane: Yes, I have. I got married four years ago.Sally: ______.

单选题The term "disruptive technology" is popular, but is widely misused. It refers not simply to a clever new technology, hut to one that undermines an existing technology--and which therefore makes life very difficult for the many businesses which depend on the existing way of doing things. Twenty years ago, the personal computer was a classic example. It swept aside an older mainframe-based style of computing, and eventually brought IBM, one of the world's mightiest firms at the time, to its knees. This week has been a coming-out party of sorts for another disruptive technology, "voice over internet protocol" (VOIP), which promises to be even more disruptive, and of even greater benefit to consumers, than personal computers. VOIP's leading proponent is Skype, a small firm whose software allows people to make free calls to other Skype users over the internet, and very cheap calls to traditional telephones--all of which spells trouble for incumbent telecoms operators. On September 12th, eBay, the leading online auction house, announced that it was buying Skype for ＄2.6 billion, plus an additional ＄1.5 billion if Skype hits certain performance targets in coming years. This seems a vast sum to pay for a company that has only ＄60m in revenues and has yet to turn a profit. Yet eBay was not the only company interested in buying Skype. Microsoft, Yahoo!, News Corporation and Google were all said to have also considered the idea. Perhaps eBay, rather like some over-excited bidder in one of its own auctions, has paid too much. The company says it plans to use Skype's technology to make it easier for buyers and sellers to communicate, and to offer new "click to call" advertisements, but many analysts are sceptical that eBay is the best owner of Skype. Whatever the merits of the deal, however, the fuss over Skype in recent weeks has highlighted the significance of VOIP, and the enormous threat it poses to incumbent telecoms operators. For the rise of Skype and other VOIP services means nothing less than the death of the traditional telephone business, established over a century ago. Skype is merely the most visible manifestation of a dramatic shift in the telecoms industry, as voice Galling becomes just another data service delivered via high-speed internet connections. Skype, which has over 54m users, has received the most attention, but other firms routing calls partially or entirely over the internet have also signed up millions of customers.

单选题This is one of the questions ______ at the meeting next week. A. discussed B. discussing C. to be discussed D. being discussed

单选题The winners enjoy all of the following EXCEPT ______.

单选题Luckily, the bullet narrowly missed the captain ______ an inch.A. byB. atC. toD. from

单选题Look at the pavilion ______ in the lake. A. reflected B. reflecting C. to reflect D. to be reflected

单选题Mr. Smith left for London this morning. I had thought he ______ until next Monday. A. isn't going B. wasn't going C. won't going D. hasn't gone

单选题Wherever two or more unusual traits or situations are found in the same place, it is tempting to look for more than a coincidental relationship between them.

单选题I feel it's my obligation to______my children to the arts, sports and various activities.