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How long you live has a lot to do with your environment and lifestyle, but exceptional(特別的)long life may have even more to do with your genes. For the first time, researchers have discovered a genetic recipe(基因譜)that accurately predicts who may live to 100 and beyond.
Analysis shows that 90% of the participants who lived to 100 had at least one of the signature genetic clusters(標志基因組). Dr. Thomas Perls at the Boston University School of Medicine said, “We realize this is a complex genetic puzzle. There is a long way for us to go to understand how the integration(融合)of these genes—not just with themselves but with environmental factors—is playing a role in this long life puzzle.”
Perls has studied many factors that contribute to long life, and he is the first to acknowledge that living longer isn’t likely to be simply a matter of genes. His previous work has shown, for example, that among most elderly people who live into their 70s and 80s, about 70% can owe their long life to environmental factors such as not smoking; eating a healthy, low-fat, low-calorie diet; and remaining socially engaged and mentally active throughout life.
It seems clear that those who live extremely long are benefiting from a special DNA. In fact, Perls believes that the older a person gets, the more likely it is that his or her genes are contributing to those extended years.
小題1:Which of the following is TRUE according to Paragraph 2?
A．Most long-living people have special long-life-related genes.
B．Ninety percent of the participants lived to 100 years of age.
C．All the long-living people have only one signature genetic cluster.
D．Scientists know how the integration of the genes helps people live long.
小題2: Perls may most likely agree that         .
A．most people living extremely long benefit from not smoking
B．living longer just depends on certain genetic recipes
C．environmental factors play an important role in long-living
D．being mentally active has nothing to do with living an old age
小題3: Which of the following is FALSE according to the text?
A．Remaining socially engaged helps a person to live long.
B．A genetic recipe can accurately predict who may live to 100 and beyond.
C．Perls is the first to think living longer is just a matter of genes.
D．The older he gets, the more likely the genes contribute to his extended years.
小題4:Which of the following would be the best title for the text?
A．Genes May Predict Who Lives to 100B．Environment And Genes
C．Genes, the Secret of Long LivingD．Lifestyle And Genes

小題1:A
小題2:C
小題3:C
小題4:A

試題分析：人的壽命和什么有關呢？波士頓大學的Thomas Perls博士指出除了人的居住環(huán)境、健康低脂、低碳的飲食，積極的心態(tài)和有規(guī)律的鍛煉外，人的基因也在人的壽命中起著重要作用。而且一個人越長壽，他的基因就起的作用就越大。
小題1:A細節(jié)理解題。從文章首段but exceptional(特別的)long life may have even more to do with your genes.可知大多數人的壽命和基因有關，所以A選項正確。
小題2:C細節(jié)理解題。根據文章第三段His previous work has shown, that among most elderly people who live into their 70s and 80s, about 70% can owe their long life to environmental factors判斷Perl認為百分之七十到八十的人長壽和環(huán)境因素有關，所以C選項正確。
小題3:C 細節(jié)理解題。根據文章第三段中的he is the first to acknowledge that living longer isn’t likely to be simply a matter of genes.可知C選項內容錯誤。
小題4:A主旨大意題。作者在文章首段提出研究人員發(fā)現基因譜能準確預測哪些人能夠長壽，然后就此展開詳細敘述，由此可知最佳題目應該是Genes May Predict Who Lives to 100，故A選項正確。
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A．Because the judge was against Singer for his unfriendly attitude.
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D．Because Singer and Howe had both invented the same machine.
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