Scientists also differ on what kind of life the super aged might live. "It remains to be seen if you pass 120, you know; could you be healthy enough to have good quality of life?" said Leonard Peon, director of the University of Georgia Gerontology Centre "At present people who could get to that point are not in good health at alL'

　　1. By saying" we are knocking at the door of immortality", Michael Zey means_______.

　　A. they believe that there is no limit of living

　　B. they are sure to find the truth about long living

　　C. they have got some ideas about living forever

　　D. they are able to make people live past the present life span

　　答案: C

　　指导：immortality的意思为“永生”，所以MichaelZey觉得人可以长生不死。

　　2. Donald Louria's attitude toward long living is that

　　A. people can live from 120 to 180

　　B. it is still doubtful how long humans can live

　　C. the human body is designed to last about 120 years

　　D. it is possible for humans to live longer in the future

　　答案: D

　　指导：从第三段Donald的谈话可知，他认为人可以活120～180岁甚至更久，200～300岁。A项表述不完整。

　　3. The underlined"it' ( Paragraph 4) refers to _______.

　　A. a great push

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