此行多一个词：把多余的词用斜线（\）划掉，在该行右边横线上写出该词，并也用斜线划掉。

此行缺一个词：在缺词处加一个漏字符号（^），在该行右边横线上写出该加的词。

此行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。

注意：原行没有错的不要改。

    Exercising is one of the most important thing we can do for our bodies.

    Eating good food and drinking water are not enough to make us        stronger and much healthy. A person should exercise at least three times a week for an hour or more. This is even more important if a person is too heavily.

    If they want to lose weigh, they may have to exercise five to six times a week. Running and walking are good with your heart. You will feel really relaxing after you finish the exercise. When you run, you have to use your legs and arms. This make your legs stronger. If you've never exercised in before, it is best to start slowly.

    It is also a good idea chat with your doctor before you start exercising.

I usually go to the library in weekends.

Zhu Hui is living with a American family in New York.