七选五There is an English saying:“【小题1】..” Until recently, few people took the saying serious

七选五
There is an English saying:“ 【小题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. 【小题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.【小题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. 【小题4】. .
【小题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 healthF

(答案→)F 解析：本文介绍了欢笑确实对身体健康有益处。【小题1】根据There is an English saying可知这里想说欢笑是最好的药，故选Ｆ。【小题2】根据Now, however, doctors have begun to look into laughter and the effects it has on the human body.可知这里想说欢笑确实能改善人们的健康，故与G吻合。【小题3】根据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.可知这里想说它增加血压，心脏跳动和呼吸，它也对面部的肌肉，胃甚至是脚，都有作用，故选D【小题4】根据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.，与答案C对应。【小题5】根据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.，故选B

这个解释是对的