单词填空。

    Everyone knows that exercise is important. We all need to exercise. Doctors say i_____ (1) is good for

us. It makes your heart and body s          (2). 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 w           (3) to exercise. You can walk, run, swim, skate, or play ball games. Make sure

you e           (4) in the following ways: you have to like what you're doing. Exercise enough - but not

too m          (5). It's best to exercise t           (6) each week. Thirty minutes each time is enough.

Try all kinds of things until you find one, two or even three sports that feel r           (7) for you.

    You can exercise at fitness centers (健身中心). They have l            (8) of equipment (设备) there.

The equipment will help exercise your arms, legs and other parts of your body to make you f           (9).

Some people buy equipment for their homes. But it is very expensive.

    Exercising can be fun. Friends can exercise t           (10) at a fitness center, or they can play

sports together. How do you exercise?