In only two decades Asian Americans have become the fastest-growing U.S. minority (少数民族). As their children began moving up through the nation's 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 educations 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 arts 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 breeds 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. Indeed, it was not until 1952 that laws were laid down giving all Asian immigrants the right to citizenship.
While making tremendous achievements at college, Asian- American students ______.

A．generally feel it is a shame to have to depend on their parents

B．feel they are mistreated because of limited knowledge of English

C．are afraid that their academic successes bear a strong Asian character

D．still worry about unfair treatment in society

What are the major factors that determine the success of Asian Americans?

A．Asian culture and the American educational system.

B．A solid foundation in basic mathematics and being Asian Americans.

C．Hard work and intelligence.

D．Parental help and a limited knowledge of English.

Why do the two “explanations” (Line 1, Para. 3 ) worry Asian Americans ?

A．American academic achievements have taken on too strong an Asian character.

B．They are afraid that they would again be isolated from American society in general.

C．People would think that Asian students rely on their parents for success.

D．Asian Americans would be a threat to other minorities

The author’s tone in this passage is                      .

A．objective

B．sympathetic

C．doubtful

D．critical

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