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  3. People need to be active to be healthy. Our modern lifestyle and all the conveniences we’ve become used to have made us sitting

People need to be active to be healthy. Our modern lifestyle and all the conveniences we’ve become used to have made us sitting

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问题     People need to be active to be healthy. Our modern lifestyle and all the conveniences we’ve become used to have made us sitting much of the time - and that’s dangerous for our health. Sitting around in front of the TV or the computer, riding in the car for even a short trip to the store and using elevators instead of stairs, all contribute to our inactivity. Physical inactivity is as dangerous to our health as smoking!
    Add up your activities during the day in periods of at least 10 minutes each. Start slowly... and build up. If you’re already doing some light activities move up to more moderate ones. A little is good, but more is better if you want to achieve health benefits.
    Scientists say add up 60 minutes of physical activity every day to stay healthy or improve your health. Time needed depends on effort - as you progress to moderate activities, you can cut down to thirty minutes, four days a week.
    Physical activity doesn’t have to be very hard to improve your health. This goal can be reached by building physical activities into your daily routine. Just add up in periods of at least ten minutes each throughout the day. After three months of regular physical activity, you will notice a difference - people often say getting started is the hardest part.
     (From Handbook for Canada’s Physical Activity Guide to Healthy Active Living p. 4. Canadian Society for Exercise Physiology, Ottawa, Ontario, 1998)
Time needed for physical activity depends on______.
选项 A、health
B、effort
C、money
D、kinds of activities
答案B
解析 第三段，科学家说每天的运动时间叠加起来60分钟会使你保持健康或改善你的健康。运动时间的长短依据你的努力。
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