问题描述：
＿＿＿is good for your body.A.Do exercise B.Doing
＿＿＿is good for your body.
A.Do exercise B.Doing exercise C.Doing exercises D.Do exercises
＿＿＿is good for your body.
A.Do exercise B.Doing exercise C.Doing exercises D.Do exercises
问题解答：
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