Old age may not sound exciting.But recent findings offer good news for older people and for people worried about getting older.Researchers found that people become happier and experience less worry after they reach the age of fifty.In fact，they say by the age of eighty­five，people are happier with their life than they were when they were eighteen years old.

    The findings came from a survey of more than three hundred forty thousand adults in the United States.The Gallup Organization questioned them by telephone in 2008.At that time，the people were between the ages of eighteen and eighty­five.The researchers asked questions about emotions like happiness，sadness and worry.They also asked about mental or emotional stress.

    Arthur Stone in the Department of Psychiatry and Behavioral Science at Stony Brook University in New York led the study.His team found that levels of stress were highest among adults between the ages of twenty­two and twenty­five.The findings showed that stress levels dropped sharply after people reached their fifties.

    The study also showed that men and women have similar feeling patterns as they grow older.However，women at all ages reported more sadness，stress and worry than men.

    Researchers say they do not know why happiness increases as people get older.One theory is that，as people grow older，they grow more thankful for what they have and have better control of their feelings.They also spend less time thinking about bad experiences.

    Professor Stone says the emotional patterns could be linked to changes in how people see the world，or maybe even changes in brain chemistry.

    The researchers also considered possible influences like having young children，being unemployed or being single.But they found that influences like these did not affect the levels of happiness and well­being related to age.

阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。

    In the tenth grade，I began working for free at a vet's that was run by a friend. I wanted to get experience for what I thought would be my future job. However，on one particular Saturday morning I learnt something perhaps more important.

    The hospital was in the middle of one of the poorer sections of the city and some people could only pay for the most basic treatments. On this Saturday，a man and his young son，who was probably about 7 years old，walked in with a small cat in a cardboard box. There was something wrong with the cat's left eye. But the man could not afford to pay for the cost of the medicine. He kept quiet for a while，and then he asked where the nearest animal shelter was. Hearing this，his son cried and started to argue with him. All of a sudden，an older woman who was sitting in the waiting room stood up，walked up to the counter，and told the man that she would pay for the cost. The man thanked her and the son got to keep a healthy cat.

    I always thought it was the right thing to help out a needy person，but I only saw people do acts of kindness on TV or in movies. What the woman did made me believe that these things do happen in real life，and quite often.

Now，when I can't decide whether to help someone who is in need，I remember this woman，and then I have the courage to step up to the plate. Sometimes other people follow.

    American and British people use different greetings. In the USA the commonest greeting is “Hi”. In Britain it is “Hello!” or “How are you?”. “Hi!” is creeping(不知不觉地进入) into British, too. When they are introduced to someone, the Americans say, “Glad to know you.” The British say, “How do you do?” or “Pleased to meet you.” When Americans say “Good-bye”, they nearly always add, “Have a good day.” or “Have a good trip.” etc. to friends and strangers alike. Britains are already beginning to use “Have a good day.”

    The British usually use “got” in the sense of “have”. The Americans hardly ever do.

AmE: Do you have a car, room, etc.? Yes, I do.

BrE: Have you got a car, room, etc.? Yes, I have.

    There are a number of differences between American and British English in the spelling of words, e.g. check(US)/cheque (UK). Many American words ending in “or”, e.g. honor, labor are spelt in British English with an “our,” e.g. honour, labour. Many verbs in American English with “ize” or “izing” forms, e.g. organize, realizing are spelt in BrE with “ise” or “ising”, e.g. organise, realising. In American English, “practice” is used both for the verb and noun. In BrE, the verb is spelt “practise”, and the noun “practice.” In American English, one writes “traveler,” while in British English, one writes  “traveller”.

    It was once predicted that British and American English would become separate languages finally. But the opposite has happened. The links(联系) between the two countries are so strong that linguistically(语言上地),and probably culturally(文化上地) too, they are closer together than ever.

    In every British town, large and small, you will find shops that sell second-hand goods. Sometimes such shops deal mostly in furniture, sometimes in books, sometimes in ornaments（装饰） and household goods, sometimes even in clothes.

    The furniture may often be "antique", and it may well have changed hands many times. It may also be very valuable, although the most valuable piece will usually go to the London salerooms, where one piece might well be sold for hundreds of thousands of pounds. As you look around these shops and see the polished wood of chests and tables, you cannot help thinking of those long-dead hands which polished that wood, of those now-closed eyes which once looked at these pieces with love.

    The books, too, may be antique and very precious; some may be rare first printings. Often when someone dies or has to move house, his books may all be sold, so that sometimes you may find whole libraries in one shop. On the border between England and Wales, there is a town which has become a huge bookshop as well. Even the cinema and castle have been taken over, and now books have replaced sheep as the town's main trade.

    There are also much more humble shops, sometimes simply called "junk shops", where you can buy small household pieces very cheaply. Sometimes the profits（利润）from these shops go to charity. Even these pieces, though, can make you feel sad; you think of those people who once treasured them, but who have moved on to another country or to death.

    Although the British do not worship（崇拜）their ancestors, they do treasure the past and the things of the past. This is true of houses as well. These days no one knocks them down; they are rebuilt until they are often better than new. In Britain, people do not buy something just because it is new. Old things are treasured for their proven worth; new things have to prove themselves before they are accepted.

    Why does most of the world travel on the right side today? Theories differ but there's no doubt Napoleon was a major influence. The French have used the right since at least the late 18^th century. Some say that before the French Revolution, noblemen drove their carriages on the left, forcing the peasants to the right. Regardless of the origin, Napoleon brought right-hand traffic to the nations he conquered, including Russia, Switzerland and Germany. Hitler, in turn, ordered right-hand traffic in Czechoslovakia and Austria in the 1930s. Nations that escaped right-hand control, like Great Britain, followed their left-hand tradition.

    The U.S. has not always been a nation of right-hand drivers; earlier in its history, carriage and horse traffic travelled on the left, as it did in England. But by the late 1700s, people driving large wagons pulled by several pairs of horses began promoting a shift (改变) to the right. A driver would sit on the rear (后面的) left horse in order to wave his whip (鞭子) with his right hand; to see opposite traffic clearly, they travelled on the right.

    One of the final moves to firmly standardize traffic directions in the U.S. occurred in the 20^th century, when Henry Ford decided to mass-produce his cars with controls on the left (one reason, stated in 1908: the convenience for passengers exiting directly onto the edge, especially… if there is a lady to be considered). Once these rules were set, many countries eventually adjusted to the right-hand standard, including Canada in the 1920s, Sweden in 1967 and Burma in 1970. The U.K. and former colonies such as Australia and India are among the Western world's few remaining holdouts (坚持不变者). Several Asian nations, including Japan, use the left as well—though many places use both right-hand-drive and left-hand-drive cars.

The United States you may not know

The United States is the only superpower in the world, and it is far more advanced than any other country. However, we can't simply owe its 1 and prosperity to its lucky escape from the destruction of the two world wars. What other nations should 2 is the American spirit and its social system. 

The most obvious features of the American spirit are 3 and pragmatism (务实思想). Nearly 70% of the important inventions have been made in the US since the first industrial revolution. Since the US occupies such an important position in science and technology, naturally it has become the first superpower in the world. 

Americans are always 4 with what they have achieved, and they have an appetite for adventure over the love of 5 . European countries have been pursuing a reformist policy of "high tax and high welfare" since the 1960s, while only the US 6 the policy of "high risk and high return". 7 , the US has become the leader of the third industrial revolution (in technology of information, materials and biology). 

High salary is not the only 8 that the talents from other countries find in the United States. Some characteristics of American society should not be 9 . Family backgrounds and great wisdom in building connections and playing up to the boss, to which great importance is attached in other countries, are not so important to 10 development in the US. Most people are on the same starting line, and whether one can succeed or not depends on his own ability and hard work.

However, the American character is full of paradoxes (矛盾). The American people are both extremely romantic and pragmatic. The American is a(n) 11 people, but in every field there are workaholics. The Americans are open-minded but they are very conservative on certain matters. Since China's reform and opening-up to the outside world, many media in Western countries have greatly 12 their attitudes towards China. However, the American media are singing the same old tune against China as they were in the Cold War period. The Americans 13 freedom, but their government is very fond of interfering in other countries' internal affairs. What's most puzzling is that the Americans 14 authority, but they highly respect the laws and regulations of the society. Therefore, in such a nation that values personal liberty, the society can still be kept in good order and operate with high 15 . Is it odd? No one can provide a satisfactory answer.