warm relations with a wide variety of people, five times as likely to be well paid and 16 times less likely to have been unemployed. The researchers also found that IQ and family social and economic class made no real difference in how the boys turned out. Working----at any age----is important. Childhood activities help a child develop responsibility, independence, confidence and competence---the underpinnings (基础) of emotional health. They also help him understand that people must cooperate and work toward common goals. The most competent adults are those who know how to do this. Yet work isn’t everything. As Tolstoy once said, “One can live magnificently in this world if one knows how to work and how to love, to work for the person one loves and to love one’s work.”

46. What do we know about John?

A. He enjoyed his career and marriage.

B. He had few childhood playmates.

C. He received little love from his family.

D. He was envied by others in his childhood.

47. Vaillant’s words in Paragraph 2 serve as _____.

A. a description of personal values and social values

B. an analysis of how work was related to competence

C. an example for parents’ expectations of their children

D. an explanation why some boys grew into happy men

48. Vaillant’s team obtained their findings by _____.

A. recording the boys’ effort in school

B. evaluating the men’s mental health

C. comparing different sets of scores

D. measuring the men’s problem solving ability

49. What does the underlined word “sharp” probably mean in Paragraph 4?

A. Quick to react

B. Having a thin edge

C. Clear and definite

D. sudden and rapid

50. What can be inferred from the last paragraph?