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阅读理解。
Today a lot of people work in offices.They spend most of their time indoors. In the evenings they usually sit watching TV or reading newspapers.In order to keep in good health, they know they have to exercise.
Exercising is important.Doctors say it is good for us.It makes our body strong.Children who often exercise are more alert(灵活的).This means they do better in tests and schoolwork than those who don't exercise.
There are many ways to exercise.You can walk, run, swim, skate, or play ball games.Make sure you exercise in the following ways:you have to like what you're doing.Exercise enough, but not too much.It's best to exercise twice each week.Thirty minutes each time is enough.Try all kinds of things until you find one, two or even three sports that feel right for you.
You can exercise at fitness centers.They have a lot of equipment(设备).The equipment will help exercise your arms, legs and other parts of your body.Some people buy equipment for their homes.But it is very expensive.
Exercising can be fun.Friends can exercise together at a fitness center, or they can play sports together.How do you exercise?
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