There is an English saying:“1..” Until recently, few people took the saying seriously. Now

There is an English saying:“1. .” Until recently, few people took the saying seriously. Now, however, doctors have begun to look into laughter and the effects it has on the human body. 2. .
Tests were carried out to study the effects of laughter on the body. People watched funny films while doctors checked their hearts, blood pressure, breathing and muscles. It was found that laughter has similar effects to physical exercise. 3. . If laughter exercises the body, it must be beneficial.
Other tests have shown that laughter appears to be able to reduce the effect of pain on the body. In one experiment doctors produced pain in groups of students who listened to different radio programs. The group that tolerated(忍耐) the pain for the longest time was the group which listened to a funny program. 4. .
5. . They have found that even if their patients do not really feel like laughing , making them smile is enough to produce beneficial effects similar to those caused by laughter. A．Laughter can prolong one’s life.B．As a result of these discoveries, some doctors in the United States now hold laughter clinics in which they help to improve their patients’ condition by encouraging them to laugh. C．The reason why laughter can reduce pain seems to be that it helps to produce a kind of chemicals in the brain which diminish both stress and pain.D．It increases blood pressure, the heart beating and breathing; it also works several groups of muscles in the face, the stomach and even the feet.E. Although laughter helps cure the disease, doctors still can not put this theory into clinic practice.
F. Laughter is the best medicine.
G.They have found that laughter really can improve people’s health.F

(答案→)F 解析：【小题1】从前面的句子：There is an English saying:可知后面说的是一个谚语。选F【小题2】从前面的句子：doctors have begun to look into laughter and the effects it has on the human body.可知笑可以改善人们的健康。选G【小题3】从前面的句子：It was found that laughter has similar effects to physical exercise.可知笑可知增加血压，心跳和呼吸加快。选D【小题4】从前面的句子：The group that tolerated(忍耐) the pain for the longest time was the group which listened to a funny program.可知笑可以减少疼痛的原因是会产生化学物质。选C【小题5】从后面的句子：They have found that even if their patients do not really feel like laughing 可知医生开笑声诊所帮助改善他们的状况。选B

这个问题我还想问问老师呢