B.Wellfed mice survive better though being illtreated.
C.Trained muscle produces a substance good for brain.
D.Regular exercise helps to clear rubbish away from body.
答案:D 细节理解题。由第五段最后一句话“...welltrained muscle produces an enzyme that removes harmful substances away from the body...”可知。
14.According to the last paragraph, the result of the study is ________.
A.reliable B.doubtful
C.predictable D.ambiguous
答案:A 推理判断题。该研究是在老鼠身上做的,但是它与其他研究非常吻合,所以该研究结果是可信的。
15.What's the main idea of the passage?
A.Why do you need regular exercise?
B.What matters most for your body?
C.How does exercise help your brain?
D.Why are mice chosen for the study?
答案:C 主旨大意题。由文章大意可知。
(2015·安徽省黄山市高中毕业班第二次质检)
If you are trying to achieve big goals in your life and work, the chances are that, from time to time, you hit rock bottom. Nothing works, nothing goes right, and nothing succeeds. At times like these, you may feel like throwing_in_the_towel. But before you do, read the following story. It might just change your mind.
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