结构推理 Directions: Read the following passage(s) carefully and give brief answers to the questions. For years, Jorge DelPinal's job as assistant chief of the Census (人口普查) Bureau's Population Division was to fit people into neat, distinct racial and ethnic boxes: white, black, Hispanic (西班牙人), Asian or Native American. As the son of an Anglo (英格兰人) mother and a Hispanic father, however, he knew all along that the task was not always possible. "My identity has evolved as being Hispanic, although I'm only half-and-half," he explaineD、He said he thus understood the frustration of interracial couples who have always been expected to assign just one race to their children when they fill out government forms. For the 2000 decennial (十年间的) census, that will no longer be the case. For the first time, the census forms will allow people to check off as many races as apply. As a result, the Census Bureau should obtain a better picture of the extent of intermarriage in the United States. In the absence of such a direct method, a few years ago veteran demographer (人口学家) Barry Edmonston used sophisticated mathematical modeling techniques to calculate how intermarriage is changing the face of the United States as part of an immigration study he directed for the National Research Council of the American Academy of Sciences. His research was summarized in a report entitled The New Americans: Economic, Demographic and Fiscal (财政的) Effects of Immigration. But as the Canadian-born, white husband of sociologist Sharon Lee, a Chinese-American, Edmonston really needed no computer to understand the transformation under way in this society. He and his family are living, breathing participants. The face of America is changing — literally. As President Clinton has said, within 30 or 40 years, when there will be no single race in the majority in the United States, "we had best be ready for it." For his part, Clinton is preparing for that time by talking about racial tolerance and the virtues of multiculturalism. (311 words) 1. What is the major content of Jorge DelPinal's job? 2. What racial and ethnic box can Jorge DelPinal be put into? 3. What great change has taken place in the 2000 decennial census? 4. How could the veteran demographer Barry Edmonston understand the change of America caused by immigration? 5. How will the face of America be changed in the future?