Lesson 54 Get Some Exercise
作者:孟佳 来源:原创 更新时间:2008-08-12 点击数:208
Exercise helps make your body healthy and strong.
Riding a bike is exercise. Walking to school is exercise. Playing ping-pong is exercise.
How much exercise do you need? You need about twenty minutes of exercise three times a week.
What’s a minute! Sixty seconds make a minute! Sixty minutes make an hour!
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