Question 19 is based on the passage you have just heard.

听力原文

      “One 60-minute run can add 7 hours to your life.” This was a claim made by The Times last week. The claim was based on a new review of studies about the effects of running. (19) [The review concluded that on average, runners live 3 years longer than non-runners, and that running does more to extend life than any other form of exercise.] But there’s more to running than its health benefits. (20) [Research published in recent years has shown that running changes your brain and mind in some fascinating ways, from increasing your brain function to regulating your emotions.]

        However, the precise effects vary according to whether you engage in short, fast running or long distance running. For example, in one study, researchers compared participants’ ability to learn new words after several minutes of intense running and after 40 minutes of gentle running. Participants were able to learn 20% faster after the intense running, and they showed a superior memory when tested again a week later. (21) [In another study, researchers asked volunteers to jog for 30 minutes and then show them clips from a sad movie.] Participants who usually struggled to handle negative emotions were more intensely affected by the sad clips, just as you expect. (21) [But crucially, this was less so if they had completed the 30-minutes jog.] The researchers said moderate exercise appears to have helped those participants to be less vulnerable to the impact of the sad movie.

19. What does the new review of studies claim?

解析：B。录音开头提到，跑步60分钟可以增加7个小时的寿命，接着说这是基于一项新研究综述，该综述得出的结论是，跑步比其他任何形式的锻炼都更能延长寿命。B项与此内容相符，其中的the best exercise for extending one’s life是录音中does more to extend life than any other form of exercise的同义转述，故为正确选项。

错项排除：录音并没有对比跑步和散步，A项无依据，故排除。C项利用录音中的60-minute进行干扰，但录音中是说跑步60分钟可以增加7个小时的寿命，并没有说人们每天至少应该锻炼60分钟，故C项错误。D项的 the easiest form of exercise在录音中无依据，故排除。