TEXT G

　　First read the following question.
　　83. The main theme of the passage is ____ in the G-7 nations.
　　A.aging
　　B.wealth
　　C.death rates
　　D.work force

　　Now, go through TEXT G quickly and answer question 83.
　　Citizens of the world’s wealthiest countries may live longer than previously predicted, according to a study sponsored by the National Institute on Aging. By 2050, people in the G-7 nations (Canada, France, Germany, Italy, Japan, the United Kingdom, and the United States) may be living anywhere from 1.3 years to 8 years longer than official estimates now predict. Researchers at Mountain View Research in Los Altos, California, examined 50 years of mortality data and found a long-term decline in death rates. That may mean that fewer workers will have to support many more elderly in the future than governments currently expect.