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 最近科學(xué)家發(fā)現(xiàn)，在很多動物和人類中有一種叫做DAF-16的基因，它的存在對于人類的自然衰老、免疫系統(tǒng)和抵抗力都有著很大的影響．

解答 71-75 BADCA
71．B 邏輯推理題．通讀文章可知，本文講述了科學(xué)家發(fā)現(xiàn)的有關(guān)基因DAF-16的作用，同時文章多次出現(xiàn)scientists，gene，aging，immunity and resistance等科學(xué)術(shù)語，由此可知，本文最可能出現(xiàn)在報紙中的科學(xué)類欄目中，所以B項為最佳選項．
72．A 事實細(xì)節(jié)題．從第四段中的that things like resistance and aging tend to go hand in hand可知，抵抗力和衰老是相伴相隨的，所以答案選A項"抵抗力與衰老有關(guān)聯(lián)"．
73．D 事實細(xì)節(jié)題．從第三段第一句可知，人類的快速老齡化給醫(yī)療和社保帶來了空前的挑戰(zhàn)，由此答案選D項．
74．C 邏輯推理題．結(jié)合全文尤其倒數(shù)后兩段的內(nèi)容可知，DAF-16對人類的衰老和抵抗力等有著不小的影響和作用，所以C項正確．
75．A 主旨大意題．從全文知，本文講述了科學(xué)家發(fā)現(xiàn)DAF-16基因?qū)τ谌祟惖乃ダ�、免疫和抵抗力都有著很大的影響，所以A項"科學(xué)家發(fā)現(xiàn)與衰老有關(guān)的基因"是最佳標(biāo)題．

點評 閱讀理解題測試考生在閱讀基礎(chǔ)上的邏輯推理能力，要求考生根據(jù)文章所述事件的邏輯關(guān)系，對未說明的趨勢或結(jié)局作出合理的推斷；或根據(jù)作者所闡述的觀點理論，對文章未涉及的現(xiàn)象、事例給以解釋．考生首先要仔細(xì)閱讀短文，完整了解信息，準(zhǔn)確把握作者觀點．

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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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