Section C
Directions: In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard. For blanks numbered from 44 to 46 you are required to fill in the missing information. For these blanks, you can either use the exact words you have just heard or write down the main points in your own words. Finally, when the passage is read for the third time, you should check what you have written.
注意:此部分试题在答题卡2上;请在答题卡2上作答。
Part III Section C
One of the genes that protects us from cancer may also help delay aging, according to a new study.
The findings could also one day lead to new drugs that prevent or fight cancer while healthy youth and life span, said Manuel Serrano, a researcher at the Spanish National Cancer Research Centre, who worked on the study.
Serrano said researchers engineered mice to have an extra copy of a key cancer-fighting gene called p53 and found it also played an important role in delaying aging.
Everyone agrees that the aging is produced by the of faulty cells, Serrano said. In other words, p53 delays aging for exactly the same reason that it prevents cancer.
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