4．Among all the fast growing science and technology，the research of human genes，or biological engineering as people call it，is drawing more and more attention now．Sometimes it is a hot topic discussed by people．
The greatest thing that gene technology can do is to cure serious diseases that doctors at present can almost do nothing with，such as cancer and heart disease．Every year，millions of people are murdered by these two killers．And to date，doctors have not found an effective way to cure them．But if the gene technology is applied，not only these two diseases can be cured completely，bringing happiness and more living days to the patients，but also the great amount of money people spend on curing their diseases can be saved，therefore it benefits the economy as well．In addition，human life span（壽命） can be prolonged．
Gene technology can help people to give birth to healthy and clever children．Some families，with the English imperial family being a good example，have hereditary（遺傳的） diseases．This means their children will for sure have the family disease，which is a great trouble for these families．In the past，doctors could do nothing about hereditary diseases．But gene technology can solve this problem perfectly．The scientist just need to find the wrong gene and correct it，and a healthy child will be born．
Some people are worrying that the gene research can be used to manufacture human beings in large quantities．In the past few years，scientists have succeeded in cloning a sheep，therefore these people predict that human babies would soon be cloned．But I believe cloned babies will not come out in large quantities，for most couples in the world can have babies in very normal way．Of course，the government must take care to control gene technology．

66．What does"these two killers"in the second paragraph refer to？C
A．Gene technology and another treatment of the two diseases．
B．The two murderers who killed the cloned baby．
C．The two diseases of cancer and heart disease．
D．Hereditary diseases and cancer．
67．What's the main idea of the third paragraph？A
A．How gene technology can be applied in the field of treating hereditary diseases．
B．Gene technology can be used to clone human babies．
C．Gene technology can help people to give birth to a baby．
D．Gene technology can help the English imperial family out．
68．In what way gene technology can help to treat hereditary diseases？B
A．Using gene technology，people with hereditary diseases can have more living days．
B．Using gene technology，the scientist finds the wrong gene and corrects it．
C．Using gene technology，human babies can be cloned．
D．Doctors can cure cancer and heart disease with the help of gene technology．
69．What is the main purpose of writing this passage？A
A．Expressing the writer's idea that gene technology will benefit people．
B．Telling people the disadvantages of gene technology．
C．Telling the readers that gene technology will not benefit people．
D．Explaining that gene technology will also do harm to the humanity．

分析 本文屬于說明文閱讀，作者通過這篇文章主要向我們描述了基因技術(shù)的優(yōu)點(diǎn)，它不僅可以治療目前最嚴(yán)重的癌癥和心臟病，還可以幫助人們生育健康聰明的孩子，雖然有人擔(dān)心基因技術(shù)可能會損傷人類，然而作者堅(jiān)信它能造福人類．

解答 66．C．細(xì)節(jié)理解題．根據(jù)文章第二段"such as cancer and heart disease．Every year，millions of people are murdered by these two killers"，可知每年造成數(shù)百萬人死亡的元兇就是癌癥和心臟��；故選C．
67．A．推理判斷題．根據(jù)文章第三段"In the past，doctors could do nothing about hereditary diseases．But gene technology can solve this problem perfectly"，可推出基因被應(yīng)用于治療家族疾病；故選A．
68．B．細(xì)節(jié)理解題．根據(jù)文章第三段"The scientist just need to find the wrong gene and correct it，and a healthy child will be born"科學(xué)家只需要找到錯誤的基因并糾正它，一個健康的孩子就能出生；故選B．
69．A．推理判斷題．根據(jù)文章最后一段"But I believe cloned babies will not come out in large quantities"，可知作者堅(jiān)信基因技術(shù)對人類是有益的，因此作者的目的是表達(dá)了作者的基因技術(shù)將造福人類的觀點(diǎn)；故選A．

點(diǎn)評 考察學(xué)生的細(xì)節(jié)理解和推理判斷能力，做細(xì)節(jié)理解題時一定要找到文章中的原句，和題干進(jìn)行比較，再做出正確的選擇．在做推理判斷題不要以個人的主觀想象代替文章的事實(shí)，要根據(jù)文章事實(shí)進(jìn)行合乎邏輯的推理判斷．

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68．The underlined word"longevity"in the second paragraph probably refers toB．
A．health      
B．long life      
C．a(chǎn)geing          
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B．women's ageing process
C．the gender difference              
D．hearts and long life
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C．the female heart loses few of the cells with age
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