84. In 1 989 there were 3.5 workers for every person 65 and older; by the year 2030, there will only be 2 workers for every person 65 and older.

82. will be a change in the proportion(比例) of the nation’s workforce.

81. will be a gradual change in the family unit；(Family unit change, 概括在3个词以内)

85. In 1989 there were 3.5 workers for every person…

　　　　　 B．讲究概括主要信息(综合、整合多条信息)的能力。如：

83. it will move away from the nuclear family and towards a multigenerational family.

77. 39 million Americans Will be 65 or older by the year 2010；(和后面对应by 2020, by 2030)

2、概括主要信息(综合、整合多条信息)(如81，82，84，79题)；

1、获取主要信息(直接信息)(如：77，83，85题)；