And in Church’s study,participants gained more than physical benefits.They also gained benefits like less anxiety and fewer symptoms of depression.They also discovered something many of us long for:more energy.

　　“It wasn’t a dose-response(剂量效应)—as in,‘the more exercise you did,the more your energy increased,’”Church says.“Actually,all three exercise groups increased their levels of energy the same.”

　　【语篇导读】本文是议论文。文章通过研究证明散步有益健康,并且运动量和强度与受益程度不成正比。

　　1.What does the underlined word “that” in Paragraph 2 refer to?

　　A.If people should walk the dog.

　　B.The effect of running or jogging.

　　C.If people need to exercise hard to benefit.

　　D.The importance of doing exercise regularly.

　　答案:C

　　解析:篇章结构题。由第二段开头的“But are they kidding themselves...as good for us?”及下文的研究可推断,画线词指代人们是否必须做高强度的运动才能受益。

　　2.The three groups in Church’s study 　. 

　　A.were of different ages

　　B.were required to walk slowly

　　C.were in different physical condition

　　D.were required to do different exercises

　　答案:B

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