（10小题，每小题1分，共10分）
阅读短文，从方框中选择适当的词并用其正确形式填空，使短文意思通顺、完整。请将答案写在短文后相应题号的横线上。每空限填一词，每词限用一次。方框中有两个词是多余的。

exercise  in  relax   medicine   use   club   good   happy   for   run   well   alone

Do you laugh every day? Most people do. In some countries, there are hundreds of laughter    . The people in these clubs get together every morning. First they put up their hands above their heads. Then they pretend to laugh. Soon everyone is laughing   . People say they feel  after laughing together.
Scientists believe that laughter is good for you. Why?    one thing, laughter is good exercise. When you laugh, you    many muscles(肌肉) in your body. Scientists say that one hundred laughs equal ten minutes of   . Laughing helps you     . That's good for you, too.
Why do we laugh? That is a hard question to answer. We know that people laugh more often in a group. They don't laugh very often when they are    . Many scientists believe that we use laughter to get on well with other people. Laughter helps us feel part of a group.
In England, people say that laughter is the best      . Some think that laughter helps sick people get      . Do also you think so?