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    9．Since the gene，called DAF-16in 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．
    "What we have found is that things like resistance and aging tend to go hand in hand，"May said in an interview．
    May's team compared longevity，stress resistance and immunity in four related species of worm．They also looked for differences in the activity of DAF-16in each of the four species，and found that they were all quite distinct．
    May said DAF-16was active in most cells in the body and was very similar to a group of human genes called FOXO genes，which scientists believe play a role in the aging process．
    "The fact that subtle（微妙的）differences in DAF-16between species seem to have such an impact on aging and health is very interesting and may explain how differences in lifespan and related traits have arisen during evolution，"May said．

    71．In which section may the text appear in a newspaper？B
    A．Education．         B．Science．
    C．Entertainment．     D．Culture．
    72．According to MayA，．
    A．resistance has a lot to do with aging
    B．FOXO genes can be found in worms
    C．genes play the same role in different species
    D．new drugs will change the genes in older people
    73．What can we know from the third paragraph？D
    A．New ways have been found to affect aging．
    B．Babies in the rich world will all live longer．
    C．Present social care systems are poorly managed．
    D．Aging populations are causing more challenges．
    74．From the text we know that DAF-16．C
    A．is a gene that is only found in worms
    B．can make people live longer
    C．has an effect on aging and immunity
    D．has been quite familiar to scientists
    75．What can be the best title of the passage？A
    A．Scientists Find Gene Linked to Aging
    B．Population Aging Faster than Expected
    C．How to Make People Live Longer
    D．Gene Determines How Long We Live．

    分析 最近科学家发现，在很多动物和人类中有一种叫做DAF-16的基因，它的存在对于人类的自然衰老、免疫系统和抵抗力都有着很大的影响．

    解答 71-75 BADCA
    71．B 逻辑推理题．通读文章可知，本文讲述了科学家发现的有关基因DAF-16的作用，同时文章多次出现scientists，gene，aging，immunity and resistance等科学术语，由此可知，本文最可能出现在报纸中的科学类栏目中，所以B项为最佳选项．
    72．A 事实细节题．从第四段中的that things like resistance and aging tend to go hand in hand可知，抵抗力和衰老是相伴相随的，所以答案选A项"抵抗力与衰老有关联"．
    73．D 事实细节题．从第三段第一句可知，人类的快速老龄化给医疗和社保带来了空前的挑战，由此答案选D项．
    74．C 逻辑推理题．结合全文尤其倒数后两段的内容可知，DAF-16对人类的衰老和抵抗力等有着不小的影响和作用，所以C项正确．
    75．A 主旨大意题．从全文知，本文讲述了科学家发现DAF-16基因对于人类的衰老、免疫和抵抗力都有着很大的影响，所以A项"科学家发现与衰老有关的基因"是最佳标题．

    点评 阅读理解题测试考生在阅读基础上的逻辑推理能力，要求考生根据文章所述事件的逻辑关系，对未说明的趋势或结局作出合理的推断；或根据作者所阐述的观点理论，对文章未涉及的现象、事例给以解释．考生首先要仔细阅读短文，完整了解信息，准确把握作者观点．

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    B．the program enjoys a success in schools
    C．food is wasted seriously in all schools
    D．students show no interest in the program
    34．What do we know about We Future Cycle？C
    A．It has a very long history．
    B．It donates its profits to schools．
    C．It educates parents as well as children．
    D．It occasionally provides people with free dinner．
    35．What is the significance of eating in a dumpster according to Treuhaft？D
    A．It is nicer and cleaner．
    B．It is environmentally friendly．
    C．It can save much money and energy．
    D．It can help people think about the food waste problem．

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