29．A.Though

　　B．As　

　　C．Since

　　D．Once

　　30．A.around

　　B．back

　　C．ahead

　　D．out

　　31．A.adventure

　　B．arrival　

　　C．performance　

　　D．journey

　　32．A.original

　　B．common

　　C．another　

　　D．distant

　　33．A.success

　　B．wealth

　　C．glory

　　D．happiness

　　34．A.adds

　　B．connects

　　C．devotes　

　　D．owes

　　35．A.after all

　　B．above all

　　C．at least

　　D．at first

　　Ⅲ.阅读理解

　　Since the gene，called DAF 16 in worms，was found in many animals and in humans，the finding could open up new ways to affect aging，immunity(免疫)and resistance in humans，the scientists said.

　　“We wanted to find out how normal aging is being governed by genes and what effect these genes have on other traits，such as immunity，” said Robin May of the University of Birmingham，who led the study.

　　Populations across the world are aging at a surprising pace，bringing potentially big challenges for health and social care systems.A study by Danish scientists last year found that half of babies born in the rich world today will live to celebrate their 100th birthdays.Scientists are eager to find out how people age to try to develop drugs to help them stay healthier as their lives extend.

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