【正文】 中國古代建筑師們通過這座建筑表達(dá)了他們的審美觀念。 A When I was a child, I often dreamed of the time when I could leave home and escape to the city. We lived on a farm and, in the winter especially, we were quite cut off from the outside world. As soon as I left school, I packed my bags and moved to the capital. However, I soon discovered that city life has its problems too. One big disadvantage is moneyit costs so much to go out, not to mention basics like food and housing. Another disadvantage is pollution. I suffer from asthma(哮喘 ), and at times the air is so bad that I am afraid to go outside. Then there is the problem of travelling round. Although I have a car, I seldom use it because of the traffic jams. One choice is to go by bicycle, but that can be quite dangerous. Of course there are advantages. First, there is so much to do in the city, whatever your tastes in culture or entertainment. Besides, there are wonderful jobs and greater chances of moving to a more important job or position. Finally, if you like shopping, the variety of goods is very surprisingand, what is more, shops are often only a short walk away. Is life better then, in the city? Perhaps it is, when you are in your teens(十幾歲 ) or twenties. However, as you get older, and especially if you have small children, the peace of the countryside may seem preferable. I certainly hope to move back there soon. 21. What was the writer always thinking about when he was a child? A. Staying on the farm B. Moving to the countryside C. Leaving home for the city D. Running away from the school 22. Which of the following is true about the writer? A. He is very old now. B. He is in good health. C. He prefers driving a car. D. He lives in the city now. 23. In the passage, the writer tries to _______. A. express his opinions about way of life his life in the countryside C. show an interest in the outside world D. persuade the reader to live in the city 24. How is the passage mainly developed? A. By inferring B. By paring C. By listing examples D. By giving explanations B Have you seen Jurassic Park? In this film, scientists use DNA kept for tens of millions of years to clone dinosaurs. They find trouble, however, when they realize that the cloned creatures are smarter and more dangerous than expected. That’s nothing more than a fiction. But could we really clone endangered animals? To date, the most successful attempt to do so was the cloning of a gaur, a rare oxlike animal from southeast Asia. Scientists used a cow to bring the cloned baby gaur, named Noah. Two days after birth, however, Noah died from a mon bacterial infection. Other endangered species that may be cloned include the African bongo antelope (邦戈羚羊 ), the Sumatran tiger, the cheetah (獵豹 ), and the giant panda. Next, could we really clone extinct animals? In theory? Yes. To do this, you need a wellkept source of DNA from the extinct animals such as wool mammoth (毛象 ), Tasmanian tiger, or even dinosaur, and a closely related species, still living, which could serve as a surrogate mother. In reality? Probably not. On the one hand, it’s not likely that extinct animals’ DNA could survive undamaged for such a long time. Cloning extinct animals as wool mammoth, Tasmanian tiger, or dinosaur is much more difficult due to the lack of properly wellpreserved DNA. On the other hand, for example, a gaur can have a cow as a surrogate mother, definitely not a monkey. But what about an extinct animals as unique as the panda? What species could possibly serve as a surrogate mother? Cloning presents many exciting possibilities. However, even if extinct animals are brought back, they could not survive in today’s world. Not only do most extinct animals have no habitat to love in, but the other plants and animals they depended on for food may also be gone as well. 25. It can be learned from the text that ________. A. scientists have cloned the African bongo antelope B. both the cheetah and the giant panda live in Asia C. the gaur lives in Asia and is endangered D. the gaur is an extinct species 26. The underlined words “a surrogate mother” probably refer to a female who ______. A. contributes its eggs to another female B. gives birth to a baby for another female C. gives birth to a baby of its own D. cannot give b