根据短文内容，从短文后的选项中选出适当的选项补全短文，将选项的编号依次填人题后的横线上。
   Do you laugh every day? Most people do．____That is a lot of laughter．
   In India，there are hundreds of laughter clubs．____First they put up their hands above their heads．Then they pretend to laugh．Soon everyone is laughing happily．People say they feel good after laughing together．
   Scientists believe that laughter is good for you．Why? For one thing，laughter is good exercise．____Scientists say that one hundred laughs equals ten minutes of running．Laughing helps you relax．That’s good for you，too．
   Why do we laugh? That is a hard question to answer．____They don’t laugh very often when they are alone．Many scientists believe that we use laughter to get on well with other people．Laughter helps us feel part of a group．
____Some think that laughter makes sick people get better．Do you think so，too?

A、The people in these clubs get together every morning.

B、Scientists say that people laugh about 17 times a day.

C、We know that people laugh more often in a group.

D、When you laugh, many muscles(肌肉) in your  body more.

E、Some think that laughter helps sick people get well.