In only two decades Asian Americans have become the fastest growing U.S. minority. As their children began moving up through the nation schools，it became clear that a new class of academic achievers was emerging. Their achievements are reflected in the nation’s best universities，where mathematics，science and engineering departments have taken on a decidedly Asian character. This special liking for mathematics and science is partly explained by the fact that Asian-American students who began their education abroad arrived in the U.S. with a solid grounding in mathematics but little or no knowledge of English. They are also influenced by the promise of a good job after college. Asians feel there will be less unfair treatment in areas like mathematics and science because they will be judged more objectively. And the return on the investment in education is more immediate in something like engineering than with an art degree. Most Asian-American students owe their success to the influence of parents who are determined that their children take full advantage of what the American educational system has to offer. An effective measure of parental attention is homework. Asian parents spend more time with their children than American parents do, and it helps. Many researchers also believe there is something in Asian culture that makes success，such as ideals that stress family values and emphasize education. Both explanations for academic success worry Asian Americans because of fears that they feed a typical racial image. Many can remember when Chinese, Japanese and Filipino immigrants were the victims of social isolation(隔离). Indeed, it was not until 1952 that laws were laid down giving all Asian immigrants the right to citizenship. 46. With making outstanding achievements at college，Asian- American students ________. A. feel they are mistreated because of limited knowledge of English B. are afraid that their academic successes are not recognized C. still worry about unfair treatment in society for their origin D. generally feel it a shame to have to depend on their parents 47. What are the major factors that determine the success of Asian Americans? A. A solid foundation in basic mathematics and Asian culture. B. Hard work and intelligence. C. Parents’ help and a limited knowledge of English. D. Asian culture and the American educational system. 48. Few Asian American students major in human sciences mainly because ________. A. their English is not good enough B. they are afraid they might meet with unfair judgment in these areas C. there is a wide difference between Asian and Western cultures D. they know little about American culture and society 49. Why do “both explanations” (Para.3) worry Asian Americans? A. They are afraid that they would again be separated from American society. B. People will think that Asian students rely on their parents for success. C. Asian Americans will be a threat to other minorities. D. Americans fear the academic achievements made by Asian Americans. 50. Before 1952 in America，________. A. Asian Americans could not be academically successful B. there were few immigrants from East and Southeast Asia C. immigrants were not equally treated by Asian Americans D. immigrants from East and Southeast Asia were looked down upon