Population aging is a triumph of civilization. It is the 67 conquence of attaining desired smaller family sizes and longer lives, with many living beyond 100 years. This achievement, 68 , requires vital social and economic adjustments 69 expected future demographic (人口的) realities. In particular, population aging rais critical issues 70 economic growth, employment and retirement, 71 , health care and social support rvices. As a population ages, the 72 of elderly increas, and that of children decreas. For much of the past, children outnumbered (超过) the elderly by a factor of more than six to one. Today the ratio has 73 to about three children per one older person. 74 within the next few decades, perhaps by 2060, the world’s elderly population will begin to 75 the population of children, when each group is expected to 76 for slightly less than one-fifth of the world population. Developed countries have already moved well along this transformation. But a notable 77 is the comparatively young U.S. population, where the number of children is 50% 78 than tho aged 65 and older.
Developing countries are now 79 a similar aging process, but 80 a much faster pace. Many developing countries that have experienced rapid fertility (人口出生率) are passing thr
ough this transition in a 81 of 25 years or less. As a(n) 82 of
such rapid changes, accommodating the necessary social and economic adjustments to older population age structures will likely be 83 more difficult for developing countries.
The wide 84 of conquence of population aging is of mounting 85 and significance for more developed countries — and are also 86 a worry for less developed countries.
67. A) indispensable C) inevitable
B) potential D) incredible
68. A) however C) otherwi
B) yet D) moreover
69. A) at C) over
B) with D) to
70. A) as for C) far from
B) such as D) by far
71. A) donations C) salaries
B) earnings D) pensions
72. A) portion C) proportion
B) rate D) percentage
73. A) declined C) descended
B) lesned D) slipped
74. A) But C) And
B) Or D) So
75. A) multiply C) assume
B) exceed D) reveal
76. A) account C) regard
B) call D) make
77. A) occasion C) excu
B) expectation D) exception
78. A) smaller C) fewer
B) greater D) superior
79. A) going by C) going through
B) going under D) going with
80. A) at C) by
B) on D) within
81. A) extension C) rank
B) scale D) span
82. A) development C) contrast
B) conquence D) influence
83. A) even C) just
B) still D) only
84. A) amount C) range
B) extent D) scope
85. A) care C) consideration
B) attention D) concern
86. A) completely C) sincerely
B) increasingly D) absolutely
67. C) 68. A) 69. D) 70. B) 71. D) 72. C) 73. A) 74. C) 75. B) 76. A)
77. D) 78. B) 79. C) 80. A) 81. D) 82. B) 83. A) 84. C) 85. D) 86. B)
