根据短文内容， 从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
You may know the benefits of laughter on the mind and spirit. _1_ Norman Cousins used to say that laughter has such a good effect on your body that it is like “inner jogging”.
Mayo Clinic Health Letter reports that laughter aids breathing by incresing your breathing rate.. It can even help clear mucus(黏液) from your lungs.
__2__ It increases circulation(循环) and improves the flow of oxgen and nutrition to tissues(血管) throught your body..It can help protect you against a heart attack.
3 It helps fight off colds, flu,etc. by increasing the concentration of immunolobulin (免疫球蛋白A) in your saliva(唾液) .And it may help control pain by raising the levels of certain brain chemicals.
In addition, it is a natural stress reliever（缓解）.Have you ever laughed so hard that you bent over, fell off your chair, or spit out your food? __4_
I read that a child laughs 400 times a day on average, while an adult laughs only 15 times each day. The good news is that you are allowed more than 15 laughs a day! Go ahead and double it and make it 30 times today. You may begin to notice immediate improvement in your relationships! Then double it again! __5_ People will enjoy being around you as well.
Laughter: it’s the best medicine!
A. Laughter is also good for your heart.
B. Laughter can bring some relief from mental stress.
C. A good, hearty laugh relieves physical tension(紧张) and stress.
D. However, it is confusing why laughter makes people feel so good.
E. A good laugh helps build up your body to protect against diseases
F. You are likely to feel even better and deal with problems more effectively.
G. However, are you aware of how much a good laugh can help you physically?G
网友回答
(答案→)G
解析：本文讲述的是笑对人的好处“笑一笑，十年少”。
【小题1】G 根据前一句You may know the benefits of laughter on the mind and spirit.说明笑声对人的精神有很大的好处，接下来就要讲述的是笑声对人的身体上的好处。故G项符合上下文。
【小题2】A 根据上句It can even help clear mucus(黏液) from your lungs.以及本段叙述内容说明笑声对人的心脏也是很有好处的。故A项符合上下文。
【小题3】E 根据下句It helps fight off colds, flu,etc.说明本段是关于笑的具体的好处，选项中只有E项内容与之相符。
【小题4】C 根据本段第一句it is a natural stress reliever（缓解）说明笑声可以减压，那么C项内容与之相符。
【小题5】F 根据上3句内容都是要求我们多笑，这句应该说明的是笑声的对我们影响，故F项正确。