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39. According to the passage, which of the following is true?
A. The best way to exercise is using the muscles as often as you can.
B. Daily exercise is the best way to keep fit.
C. Sweating helps you reduce your weight.
D. After doing 48—72 hours’ exercises, you must use the muscles again to keep fit.
A. The best way to exercise is using the muscles as often as you can.
B. Daily exercise is the best way to keep fit.
C. Sweating helps you reduce your weight.
D. After doing 48—72 hours’ exercises, you must use the muscles again to keep fit.
参考答案