A、 Economic growth.
B、 Reducing unemployment.
C、 Social security.
D、 How to pay growing numbers of pensioners.

【正确答案】 C

【答案解析】解析：信息明示题。短文中提到George W．Bush is making reform of social security a key goal of his second administration，可知布什政府改革的一个关键目标是社会安全问题。故选C。

A、 Aging populations will bankrupt government.
B、 Aging populations will erode economic vitality.
C、 Aging population will harm geopolitical strength.
D、 The truth is that such fears are widely exaggerated.

【正确答案】 D

【答案解析】解析：细节辨认题。短文中第一段最后一句提到这些担心、恐惧都被人们夸大了。选项A，B，C都只涉及人口老龄化的一个方面的危害，过于片面。故选项D正确。

A、 Political will.
B、 Demographics.
C、 Social security.
D、 Medicare.

【正确答案】 A

【答案解析】解析：细节辨认题。短文中提到The real problem with aging is politics，not demographics可知人口老龄化真正的问题在于政治。短文最后But there is nothing in their future to stop them from succeeding，except the lack of political will又强调了政治因素的作用。故选A。