题目

Directions: Read the followingpassage. Summarize the main idea and the main point(s) of the passage in nomore than 60 words. Use your own words as far as possible.What You Will Need to Live to100Anew approach to retirement preparation known as “longevity planning” has beenon the rise for years, with the global population of centenarians (B1岁老人)steadilygrowing. In about 40 years, the number of people 100 and older will be sixtimes as high as it is now. What, as you may wonder, enhances longevity? Whilea previous study underlined the link between longevity and higher education,having a推土机具有宽大的履带，目的为了    ，斧头、菜刀具有很窄的刃，目的是为了    ．