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  3. Walking is the easiest and simplest form of exercise. By putting one foot in front of the other, you can start to walk your ways

Walking is the easiest and simplest form of exercise. By putting one foot in front of the other, you can start to walk your ways

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问题      Walking is the easiest and simplest form of exercise. By putting one foot in front of the other, you can start to walk your ways towards a healthier lifestyle. Walking is an easy way to challenge the cardiovascular system (心血管系统), while at the same time building muscles. But to achieve these goals, a little more than a gentle walk around the block is required.
     Walking actually burns as many calories (卡洛里) as running the same distance —— if done in the correct manner and at a reasonable pace (步伐).
     Start with a basic program that you can complete three or four times a week. This should include five main steps:
   ——A beginning warm-up for about 5 minutes.
   ——A little bit faster period of 5 minutes at medium level (中等速度)
   ——A 10-minute “burning” at a high level.
   ——A 5-minute cool down period at a low level again.
   ——A suitable walking pace of around 5 kilometers per hour will burn around 80 calories in 30 minutes.
According to the passage, walking is a simple way to______.
选项 A、lose weight
B、avoid heart attacks
C、cure blood diseases
D、strengthen heart functions
答案D
解析 细节题。根据文章第一段第三句，“步行是对心血管系统的挑战，同时也锻炼厂肌肉”，判断答案应该是D 项。
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