Some people say that laughter is the best medicine.

Scientists are beginning to 【小题1】 with this. They are studying 【小题2】 seriously and are now【小题3】

it is really good for us.

So what happens 【小题4】 we laugh? We use fifteen different muscles in our face, and laughing is【小题5】

for every organ in our body. 【小题6】 we laugh, we breathe quickly and exercise the face, shoulders and chest. Our 【小题7】 pressure goes down, and our circulation gets better.

Every minute we laugh is the same as forty-five minutes of relaxation. Many doctors around the world【小题8】

that laughter helps us get better when we are sick.

Of course,【小题9】 are many kinds of laughter. We may change the way we laugh in different situations. But we all【小题10】 a laugh that is special to us. How do you usually laugh?