共用题干第三篇
Longer Lives for Wild Elephants
Most people think of zoos as safe places for animals,where struggles such as having difficulty finding
food and avoiding predators（猛兽）don't exist. Without such problems,animals in zoos should live to a ripe
（成熟的）old age.
But that may not be true for the largest land animals on Earth.Scientists have known that elephants in
zoos often suffer from poor health.Sometimes,they even become unable to have babies.
To learn more about how captivity（圈养）affects elephants, a team of international scientists compared
the life spans of female elephants born in zoos with female elephants living outdoors in their native lands.
Zoos keep detailed records of all the animals in their care,documenting factors such as birth dates,illnes-
ses,weight and death.These records made it possible for the researchers to analyze 40 years of data on 800
African and Asian elephants in zoos across Europe.The scientists compared the life spans of the zoo-born fe-
male elephants with the life spans of thousands of wild female elephants in Africa and Asian elephants that
work in logging camps（伐木场）, over approximately the same time period.
The team found that female African elephants born in zoos lived an average of 16.9 years. Their wild
counterparts who died of natural causes lived an average of 56 years一more than three times as long. Female
Asian elephants followed a similar pattern. In zoos,they lived 18.9 years,while those in the logging camps
lived 41.7 years.
Scientists don't know yet why wild elephants seem to get on so much better than their zoo-raised coun-
terparts.Georgia Mason,a biologist at the University of Guelph in Canada who led the study,thinks stress
and obesity（肥胖症）may be to blame. Zoo elephants don't get the same kind of exercise they would in the
wild,and most are very fat. Social lives of elephants are also much different in zoos than in the wild,where
they live in large herds and family groups.
The study raises some questions about acquiring more elephants to keep in zoos.While some threatened
and endangered species living in zoos reproduce（生殖）successfully and maintain healthy populations,that
doesn't appear to be the case with elephants. Unlike other animals in zoos,zoo-raised elephantsA:live a long lifeB:give birth to many babiesC:develop poor healthD:have difficulty getting food

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• Longer Lives for Wild ElephantsMost people think of zoos as safe places for animals，where struggles such as having difficulty finding food and avoiding predators (猛兽）don’t exist. Without such problems, animals in zoos should live to a ripe (成熟的）old age.But that may not be true for the largest land animals on Earth. Scientists have known that elephants in zoos often suffer from poor health. Sometimes, they even become unable to have babies.To learn more about how captivity (圈养）affects elephants，a team of international scientists compared the life spans of female elephants born in zoos with female elephants living outdoors in their native lands. Zoos keep detailed records of all the animals in their care, documenting factors such as birth dates, illnesses, weight and death. These records made it possible for the researchers to analyze 40 years of data on 800 African and Asian elephants in zoos across Europe. The scientists compared the life spans of the zoo-born female elephants with the life spans of thousands of wild female elephants in Africa and Asian elephants that work in logging camps (伐木场），over approximately the same time period. 、The team found that female African elephants born in zoos lived an average of 16. 9 years. Their wild counterparts who died of natural causes lived an average of 56 years — more than three times as long. Female Asian elephants followed a similar pattern. In zoos,they lived 18. 9 years, while those in the logging camps lived 41. 7 years.Scientists don’t know yet why wild elephants seem to get on so much better than their zoo-raised counterparts. Georgia Mason, a biologist at the University of Guelph in Canada who led the study, thinks stress and obesity (肥胖症)may be to blame. Zoo elephants don’t get the same kind of exercise they would in the wild, and most are very fat. Social lives of elephants are also much different in zoos than in the wild，where they live in large herds and family groups.The study raises some questions about acquiring more elephants to keep in zoos. While some threatened and endangered species living in zoos reproduce (生殖）successfully and maintain healthy populations, that doesn’t appear to be the case with elephants.One of the possible reasons for the zoo-raised elephants，problems is that A they do not get proper food.B they do too much exercise.C they live in large herds.D they do not live in family groups.

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• Longer Lives for Wild ElephantsMost people think of zoos as safe places for animals，where struggles such as having difficulty finding food and avoiding predators (猛兽）don’t exist. Without such problems, animals in zoos should live to a ripe (成熟的）old age.But that may not be true for the largest land animals on Earth. Scientists have known that elephants in zoos often suffer from poor health. Sometimes, they even become unable to have babies.To learn more about how captivity (圈养）affects elephants，a team of international scientists compared the life spans of female elephants born in zoos with female elephants living outdoors in their native lands. Zoos keep detailed records of all the animals in their care, documenting factors such as birth dates, illnesses, weight and death. These records made it possible for the researchers to analyze 40 years of data on 800 African and Asian elephants in zoos across Europe. The scientists compared the life spans of the zoo-born female elephants with the life spans of thousands of wild female elephants in Africa and Asian elephants that work in logging camps (伐木场），over approximately the same time period. 、The team found that female African elephants born in zoos lived an average of 16. 9 years. Their wild counterparts who died of natural causes lived an average of 56 years — more than three times as long. Female Asian elephants followed a similar pattern. In zoos,they lived 18. 9 years, while those in the logging camps lived 41. 7 years.Scientists don’t know yet why wild elephants seem to get on so much better than their zoo-raised counterparts. Georgia Mason, a biologist at the University of Guelph in Canada who led the study, thinks stress and obesity (肥胖症)may be to blame. Zoo elephants don’t get the same kind of exercise they would in the wild, and most are very fat. Social lives of elephants are also much different in zoos than in the wild，where they live in large herds and family groups.The study raises some questions about acquiring more elephants to keep in zoos. While some threatened and endangered species living in zoos reproduce (生殖）successfully and maintain healthy populations, that doesn’t appear to be the case with elephants.It was found that, compared with female wild elephants, female zoo-born elephants A lived longer.B grew up faster.C died much earlier.D enjoyed the same life spans.

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• 共用题干第三篇
  Longer Lives for Wild Elephants
  Most people think of zoos as safe places for animals,where struggles such as having difficulty finding
  food and avoiding predators（猛兽）don't exist. Without such problems,animals in zoos should live to a ripe
  （成熟的）old age.
  But that may not be true for the largest land animals on Earth.Scientists have known that elephants in
  zoos often suffer from poor health.Sometimes,they even become unable to have babies.
  To learn more about how captivity（圈养）affects elephants, a team of international scientists compared
  the life spans of female elephants born in zoos with female elephants living outdoors in their native lands.
  Zoos keep detailed records of all the animals in their care,documenting factors such as birth dates,illnes-
  ses,weight and death.These records made it possible for the researchers to analyze 40 years of data on 800
  African and Asian elephants in zoos across Europe.The scientists compared the life spans of the zoo-born fe-
  male elephants with the life spans of thousands of wild female elephants in Africa and Asian elephants that
  work in logging camps（伐木场）, over approximately the same time period.
  The team found that female African elephants born in zoos lived an average of 16.9 years. Their wild
  counterparts who died of natural causes lived an average of 56 years一more than three times as long. Female
  Asian elephants followed a similar pattern. In zoos,they lived 18.9 years,while those in the logging camps
  lived 41.7 years.
  Scientists don't know yet why wild elephants seem to get on so much better than their zoo-raised coun-
  terparts.Georgia Mason,a biologist at the University of Guelph in Canada who led the study,thinks stress
  and obesity（肥胖症）may be to blame. Zoo elephants don't get the same kind of exercise they would in the
  wild,and most are very fat. Social lives of elephants are also much different in zoos than in the wild,where
  they live in large herds and family groups.
  The study raises some questions about acquiring more elephants to keep in zoos.While some threatened
  and endangered species living in zoos reproduce（生殖）successfully and maintain healthy populations,that
  doesn't appear to be the case with elephants. Which of the following about the scientists'study is NOT true?A:They compared zoo-born elephants with wild elephants.B:They analyzed the records of 800 elephants kept in zoos.C:The zoo-born elephants they studied were kept in European zoos.D:They kept detailed records of all the elephants in their care.

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• 共用题干第三篇
  Longer Lives for Wild Elephants
  Most people think of zoos as safe places for animals,where struggles such as having difficulty finding
  food and avoiding predators（猛兽）don't exist. Without such problems,animals in zoos should live to a ripe
  （成熟的）old age.
  But that may not be true for the largest land animals on Earth.Scientists have known that elephants in
  zoos often suffer from poor health.Sometimes,they even become unable to have babies.
  To learn more about how captivity（圈养）affects elephants, a team of international scientists compared
  the life spans of female elephants born in zoos with female elephants living outdoors in their native lands.
  Zoos keep detailed records of all the animals in their care,documenting factors such as birth dates,illnes-
  ses,weight and death.These records made it possible for the researchers to analyze 40 years of data on 800
  African and Asian elephants in zoos across Europe.The scientists compared the life spans of the zoo-born fe-
  male elephants with the life spans of thousands of wild female elephants in Africa and Asian elephants that
  work in logging camps（伐木场）, over approximately the same time period.
  The team found that female African elephants born in zoos lived an average of 16.9 years. Their wild
  counterparts who died of natural causes lived an average of 56 years一more than three times as long. Female
  Asian elephants followed a similar pattern. In zoos,they lived 18.9 years,while those in the logging camps
  lived 41.7 years.
  Scientists don't know yet why wild elephants seem to get on so much better than their zoo-raised coun-
  terparts.Georgia Mason,a biologist at the University of Guelph in Canada who led the study,thinks stress
  and obesity（肥胖症）may be to blame. Zoo elephants don't get the same kind of exercise they would in the
  wild,and most are very fat. Social lives of elephants are also much different in zoos than in the wild,where
  they live in large herds and family groups.
  The study raises some questions about acquiring more elephants to keep in zoos.While some threatened
  and endangered species living in zoos reproduce（生殖）successfully and maintain healthy populations,that
  doesn't appear to be the case with elephants. It can be inferred from the last paragraph that______________.A:zoo-born elephants should be looked after more carefullyB:zoos should keep more animals except elephantsC:it may not be wise to keep elephants in zoosD:elephants are no longer an endangered species

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• Longer Lives for Wild Elephants Most people think of zoos as safe places for animals， where struggles such as having difficulty finding food and avoiding predators （猛兽） don’t exist. Without such problems, animals in zoos should live to a ripe old age. But that may not be true for the largest land animals on Earth. Scientists have known that elephants in zoos often suffer from poor health. Sometimes, they even become unable to have babies. To learn more about how captivity （圈养）affects elephants，a team of international scientists compared the life spans of female elephants born in zoos with female elephants living outdoors in their native lands. Zoos keep detailed records of all the animals in theircare, documenting factors such as birth dates, illnesses, weight and death.. These records made it possible for the researchers to analyze 40 years of data on 800 African and Asian elephants in zoos across Europe. The scientists compared the life spans of the zoo-born female elephants with the life spans of thousands of wild female elephants in Africa and Asian elephants that work in logging camps （伐木场） ，over approximately the same time period. The team found that female African elephants born in zoos lived an average of 16. 9 years. Their wild counterparts who died of natural causes lived an average of 56 years — more than three times as long. Female Asian elephants followed a similar pattern. In zoos, they lived 18. 9 years, while those in the logging camps lived 41. 7 years. Scientists don’t know yet why wild elephants seem to get on so much better than their zoo-raised counterparts. Georgia Mason, a biologist at the University of Guelph in Canada who led the study, thinks stress and obesity （肥胖症） may be to blame. Zoo elephantsdon’t get the same kind of exercise they would in the wild，and most are very fat. Social lives of elephants are also much different in zoos than in the wild, where they live in large herds and family groups. The study raises some questions about acquiring more elephants to keep in zoos. While some threatened and endangered species living in zoos reproduce （生殖） successfully and maintain healthy populations, that doesnl appear to be the case with elephants. It was found that, compared with female wild elephants, female zoo-born elephants A lived longer.B grew up faster.C died much earlier.D enjoyed the same life spans.

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