Questions 29 to 31 are based on the passage you have just heard.

　　29. What was the main harmful effect of the pest killer DDT on bald eagles?

　　30. What measure did wild-life biologists take to increase the number of bald eagles?

　　31. According to the speaker, what is the possible danger facing bald eagles?

　　Passage Three

　　A few years ago it was fashionable to speak of a generation gap, a division between young people and their elders. Parents complained that their children did not show them proper respect and obedience, while children complained that their parents did not understand them at all.

　　One important cause of the generation gap is the opportunity that young people have to choose their own life-styles. In more traditional societies, when children grow up, they are expected to live in the same area as their parents, to marry people that their parents know and approve of and often to continue the family occupation. In our society, young people often travel great distances for their education, move out of the family home at an early age, and choose occupations different from those of their parents.

　　In our modern society, parents often expect their children to do better than they did; to find better jobs, to make more money, and to do all the things that they were unable to do. But often they discover that they have very little in common with each other.

　　Finally, the speed at which changes take place in our society is another cause of the gap between generations. In a traditional culture, elderly people are valued for their wisdom, but in our society the knowledge of a lifetime may become obsolete overnight.

　　The best way to narrow the gap is that parents and children should be mutually respected.

　　Questions 32 to 35 are based on the passage you have just heard.

　　32. What does this passage mainly tell us?

　　33. Which one is the most important cause of the generation gap?

　　34. What are children expected to do in a more traditional society?

　　35. How do we narrow the gap?

　　Section C

　　Directions: In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard. For blanks numbered form 44 to 46 you are required to fill in the missing information. For these blanks, you can either use the exact words you have just heard or write down the main points in your own words. Finally, when the passage is read for the third time, you should check what you have written.

　　Although General Motors and General Electric are large multinational (36) corporations with operations around the globe, there are numerous smaller companies that engage in international trade. Because 95 percent of the world’s population and two thirds of its (37) purchasing power are located outside the United States, it is important for American (38) firms to be present in foreign markets. However, before we explain the different methods by which a company may (39) engage in international trade, we might first consider some important (40)factors that U.S. companies often fail to study before they sell products in a foreign country. These factors (41)concern differences in languages, in values and attitudes, and in political (42) climate.