It can be inferred from the first paragraph that ______. [br] According to Cynth

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问题 It can be inferred from the first paragraph that ______. [br] According to Cynthia Kenyon, anti-aging drugs in the future will ______.

选项 A、extend the average and maximum lifespan
B、be useful to test Dr Rattan’s hypothesis
C、cure some diseases related to aging
D、be taken to study their side effects

答案 B

解析根据Cynthia Kenyon定位到原文第六段。第二句指出，抗衰老药批准使用后，实施a huge natural experiment研究这些药物能否延长人们的寿命。最后两句进一步指出这项研究可以证明Dr. Rattan的观点是否正确，B与之相符。其中get under way指“进行”。第六段第三句说明增长平均和最高寿命只是一种可能，故排除A；C中cure与该段第一句中guiding against不符；D为无关选项，可直接排除。

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