题目内容
How often one hears children wishing they were grown up，and old people wishing they were young again. Each age has its pleasures and its pains，and the happiest person is the one who enjoys what each age gives him without wasting his time in useless regrets.
Childhood is a time when there are few responsibilities. If a child has good parents，he is well fed，looked after and loved. It is unlikely that he will ever again in his life be given so much without having to do anything in return. In addition，life is always presenting new things to the child-things that have lost their，interest for older people because they are too well known. A child finds pleasure in playing in the rain，or in the snow. His first，visit to the seaside is a marvelous adventure. But a child has his pains：he is not so free to do as he wishes as he thinks older people are；he is continually being told what to do and what not to do. Therefore，a child is not happy as he wishes to be.
When the young man starts to earn his own living，he becomes free from the discipline of school and parents；but at the same time he is forced to accept responsibilities. With no one to pay for his food，his clothes，or his room，he has to work if he wants to live comfortably. If he spends most of his time playing about in the way that he used to as a child，he will go hungry. And if he breaks the laws of society as he used to break the laws of his parents，he may get himself into trouble. If，however，he works hard，goes by the law and has good health，he may feel satisfied in seeing himself make steady progress in his job and in building up for himself his own position in society.
Old age has always been thought of as the worst age to be；but it is not necessary for the old to be unhappy. With old age comes wisdom and the ability to help others with advice wisely given. The old can have the joy of seeing their children making progress in life；they can watch their grandchildren growing up around them；and，perhaps best of all，they can，if their life has been a useful one，feel the happiness of having come through the battle of life safely and of having reached a time when they can lie back and rest，leaving everything to others.
The happiest people should be those who______.
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The main idea of the passage is about______.
Americans are a very energetic and mobile people，always on the run，rushing from one appointment to another，from a PTA(Parent-Teacher Association)meeting to a social planning committee.
They have very little time to spend preparing elaborate(精致的，复杂的)everyday meals to be eaten at leisure. In many homes it is rare for the whole family to sit down at supper together. Clubs and committees force them to grab a quick meal rather than a sit-down supper.
When they do have the chance to eat at home，often the working housewife prefers to prepare meals that can be quickly heated and consumed. It is no wonder，therefore，that America has become a shelter for fast food consumption.
This great transformation occurred after World War Ⅱ when many women began to work full time and spend less time at home with their families. Women，however，wanted to function well in the capacity of homemaker，as well as that of career woman but time became a precious commodity(商品)which had to be carefully used.
Therefore，it was necessary to make her life easier at home in the preparation of the family dinner. Simultaneously with women entering the job market there was also a shifting of the focus of home entertainment from the radio to the television. Television became the latest fashion in the 1950s and no one wanted to miss his or her favorite programs. And then. the place for supper shifted from the dining room to the living room.
As the customs changed，so did the culture. The immediate solution for this was the invention of the TV dinner. These were frozen meals which were divided into portions of meat and vegetables. They could easily be put into an oven(锅)and prepared within minutes. The tin trays(托盘)in which they were served were conveniently carried into the living room and dinner Was consumed in front of a TV set. Cleaning up afterwards Was no problem. The fin trays were easily thrown into the garbage. From fast dinners at home the next step was quick eating while on the road. Love for TV was combined with the fascination for the automobile. It is not odd that with the development of the superhighways America saw the beginning of fast food chains. McDonald's paved the way with its variety of burgers and cold drinks soon to be followed by all kinds of other foods. Today dozens of fast-food chain stores can be found along highways，in modem shopping malls and scattered throughout neighborhoods in America. Taco Bell，Pizza Hut，Roy Roger's，Burger King and Wendy's ale just a few of the fast-food chains which are now part of American culture. They offer chicken，donuts，tacos and pizza，all quickly produced in great quantities for the masses. These establishments have given shape to the modem lifestyles and diet of the American people.
In America，the whole family seldom have dinner together at home because______.
【C17】
【C15】
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