How long you live has a lot to do with your environment and lifestyle, but exceptional long life may have even more to do with your genes. For the first time, researchers have discovered a genetic recipe( 墓因谱 ) that can tell who may live to 100 and beyond. Detailed examination shows that 90% of the people who lived to 100 had at least one of the signature genetic clusters (标志基因组). Dr. Thomas Perls at the School of Medicine of Boston University said, "We realize that this is a complex genetic puzzle. There is a long way for us to go to understand how the combination of these genes with lifestyle factors is playing a role in this long life puzzle." Perls has studied many factors that help people to live long, and he is the first to recognize that living longer isn't likely to be simply a matter of genes. His previous work has shown, for example, that among mostly elderly people who live into their 70s and 80s, about 70% can owe their long life to lifestyle factors such as not smoking; eating a healthy, low-fat, low-calorie diet; and remaining socially engaged and mentally active ( 恩维活跃 ) 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. 1 . Perls may most likely agree that . A. living longer just depends on certain genetic recipes B. the combination of certain genes with lifestyle factors plays an important role in long-living C. most people living extremely long benefit from not smoking D. being mentally active has nothing to do with living an old age 2 . Which of the following is NOT true according to the passage? A. Remaining socially engaged helps a person to live long. B. If you want to live to 100, you must have the right genes. C. A genetic recipe can predict who may live to 100 and beyond. D. Perls is the first to think living longer is just a matter of genes. 3 . Which of the following would be the best title of the passage? A. The Secret of Long life B. Diet and Smoking C. Genes Decide Your Lifestyle D. Environment and Resources 4 . Perls believes that . A. they have understood how certain genes with lifestyle factors are playing a role in a long life B. there is a long way for them to get to understand what leads to a long life C. they are close to the factors why people can live a long life D. they fail to understand what makes a long life possible 5. In which part of a newspaper can you most probably find this passage? A. Sports and Games B.Entertainment and Economics C. Medicine and Science D. Culture and Custom