D  have cost the United States government more than $200 billion.
E  may help prevent mental decline.
F  may get stronger at night.
G  allow old people to be more independent.
H  can reduce stress in difficult situations.
第二段
正数第二行“lifestyles of more than 20,000 men and women over 65. Researchers, now analysing

the results of data gathered in 1994, say arthritis, high blood pressure and circulation

problems-the major medical complaints in this age group-are troubling a smaller proportion

every year”，对应第十四题。
倒数第三行“And the data confirms that the rate at which these diseases are declining

continues to accelerate”，对应第十五题。
第三段
正数第二行“He says the problems doctors accepted as normal in a 65-year-old in 1982 are

often not appearing until people are 70 or 75 ”，对应第十六题。
第四段
正数第一行“Clearly, certain diseases are beating a retreat in the face of medical advances

”，对应第十七题。
正数第二行“But there may be other contributing factors. Improvements in childhood nutrition

in the first quarter of the twentieth century, for example, gave today’s elderly people a

better start in life than their predecessors ”，对应第十八题。

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