Today， we are living a rapid life． We always try to get things done （31）　　． On weekdays， we are busy （32）　　or working． One of the （33）　　is that we don't have enough exercise． We all know August 8th is National Fitness Day． If we exercise for one hour a day， we will work healthily for 50years and live a happy life forever．

Scientists have found that people who often exercise are （34）　　　than those who don't， whether they do it indoors or outdoors． According to a survey， students can learn better and feel less stressed when they have more （35）　　to play sports at school． Many young women enjoy doing yoga（瑜伽） or dancing to relax and stay（36）　　 In some housewives' opinion， doing housework is a good way to burn calories（卡路里）．It can keep them （37）　B　while getting their house in order． To be strong and full of （38）　 ， some men like running， riding bicycles or playing ball games．

You will be healthy both in the（39）　　and mind by doing exercise． This weekend， don't make any plans， just get up early and start （40）　　．

31． A． quickly	B． slowly	C． loudly
32． A． playing	B． sleeping	C． studying
33． A． differences	B． problems	C． trouble
34． A． more dangerous	B． more natural	C． healthier
35． A． time	B． money	C． food
36． A． heavy	B． thin	C． tall
37． A． jumping	B． moving	C． eating
38． A． energy	B． safety	C． suggestions
39． A． tooth	B． head	C． body
40． A． exercising	B． offering	C． waiting