Hi

Today i want to make a report about laugh.why do people laugh?most of all us laughs every day,scientists say that people laugh about seven times a day.scientists believe that laugh is good for us.why?For one thing ,laugh is good exercise,when we laugh we exercise many muscles in our body.when we laugh we also breath deeply.this helps us to relax.why do we laugh? that is a hard question to answer.May be when we laugh we express our happiness, or we use laugh to connect to other people.In English people say that laugh is the best medicine.they think that laugh helps sick people get well, Do you think so too? As for me I believe this.