单选题 Questions 29 and 30 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. Now, listen to the news.

单选题 Biotecbnology in one form or another has flourished since prehistoric times. When the first human beings realized that they could plant their own crops and breed their own animals, they learned to use biotechnology. The discovery that fruit juices fermented into wine, or that milk could be converted into cheese or yogurt, or that beer could be made by fermenting solutions of malt and hops began the study of biotechnology. When the first bakers found that they could make a soft, spongy bread rather than a firm, thin cracker, they were acting as fledgling biotechnologists. The first animal breeders, realizing that different physical traits could be either magnified or lost by mating appropriate pairs of animals, engaged in the manipulations of biotechnology. What then is biotechnology? The term brings to mind many different things. Some think of developing new types of animals. Others dream of almost unlimited sources of human therapeutic drugs. Still others envision the possibility of growing crops that are more nutritious and naturally pest-resistant to feed a rapidly growing world population. This question elicits almost as many first-thought responses as there are people to whon the question can be posed. In its purest form, the term "biotechnology" refers to the use of living organisms or their products to modify human health and the human environment. Prehistoric biotechnologists did this as they used yeast ceils to raise bread dough and to ferment alcoholic beverages, and bacterial cells to make cheeses and yogurts and as they bred their strong, productive animals to make even stronger and more productive offspring. Throughout human history, we have learned a great deal about the different organisms that our ancestors used so effectively. The marked increase in our understanding of these organisms and their cell products gives us the ability to control the many functions of various cells and organisms. Using the techniques of gene splicing and recombinant DNA technology, we can now actually combine the genetic elements of two or more living cells. Functioning lengths of DNA can be taken from one organism and placed into the cells of another organism. As a result, for example, we can cause bacterial cells to produce human molecules; cows can produce more milk for the same amount of feed, and we can synthesize therapeutic molecules that have never before existed.

单选题As a public relations officex, he is said ______ some very influential people. A. to know B. to be knowing C. to have been knowingD. to have known

单选题Operation Buccaneer is ______

单选题______ in an atmosphere of simple living was what his parents wished for.

单选题If it is true that healthier nations are usually wealthier nations, in which position will the United States most likely to rank.'?

单选题The primary purpose of the passage is to discuss the ______.

单选题How many instruments are mentioned in the passage?

单选题What is Sam suffering from?

单选题______ your timely advice, I would never have known how to go about the work. A. Unless B. Except for C. Not for D. But for

单选题Question 27 and 28 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions.

单选题Questions 18 to 20 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage.

单选题

单选题Fat cannot change into muscle______ changes into fat.

单选题The Brief Wondrous Life of Oscar Wao is Junot Diaz's Pulitzer Prize-winning novel of 2007. It's the story or story-set of several generations of a Dominican and later Dominican-American family, the de Leons. The de Leons are, or may be, cursed, along with thousands of other Dominicans. They are certainly victims, of the notorious despot Rafaello Trujillo, who ruled or misruled Dominica in the middle decades of the 20th century. The book is a tale of murder, torture, bad luck, unhappiness, but also great resilience (恢复). The novel's central character is Oscar de Leon ("Wao"), a grotesquely fat, ugly, sexually frustrated working class Dominican kid living in Paterson, New Jersey. His story frames the tragic history of the de Leon family. The closest people to him are also the story's narrators.. Lola, Oscar's sister, and Yunior, a college friend. Oscar is a geek, and in nothing is he more geeky than in his loser's passion for science-fiction and fantasy and role-playing games. But this sad young man is also immensely charming and kindly, and his nerdish passions will provide part of the redemptive charge of Diaz's saga. His mother is the beautiful and formidable Belicia. Belicia seems appallingly cruel to her daughter, the no-less striking Lola, and we are unsurprised when Lola runs away from home. And yet the reader has sympathy too for the mother, who has contracted breast cancer, and who spends the whole of her life, from dawn till dusk, working for her family. All of this must make the novel seem very bleak, and it often is. But there is light in the darkness, the sheer gutsiness of the characters. How ever often Oscar, Belica and Lola are knocked down, they always seem to get up. Another resource of hope is the incredible language Díaz has devised, which has enormous bounce and humor. A combination of Spanish and English, it is a recognizable product of modern America, with its huge Spanish-speaking population. It can appropriate everything, from street speech to high literature; from the history of Latin America to the popular genres of sci-fi and fantasy so beloved of Oscar. With this language a spell or "zafa" is cast against the curse or "fukǘ" of Trujillo and the nightmare of his regime and its legacy. As one of the narrators, Yunior, says early in the book: "Even now as I write these words I wonder if this book ain't a zafa of sorts. My very own counterspell. /

单选题The writer believes that happiness lies in ______.

单选题 Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage.

单选题The writer suggests that many of today's early marriages result from______.