We can do all kinds of sports to keep fit, but do you know which is the best one? 1. ____ (scientist) now say that running is one of the best ways to keep fit. It can make you 2. ____ (feel) healthier and look better. Some say it can even make you live longer. All you need for running is some simple clothes and 3. ____ pair of sports shoes. You don't need 4. ____ (buy) special clothes but you should get a pair of sports shoes. And remember you should always buy shoes for running one size 5. ____ (large) than your usual size.
Some people find running 6. ____ (bored). So they go cycling or 7. ____ (swim) instead. Also, you 8. ____ (should) exercise every day. It's very important to rest 9. ____ (two) a week. You should both eat 10. ____ (good) and drink lots of water. But you can still have nice things 11. ____ chocolate sometimes. Do some leg exercises every week as well (也,还), because this 12. ____ (make) you stronger and helps you run better.
If you're a beginner, there 13. ____ (be) lots of ways to make exercise fun. You can join a club 14. ____ you can exercise with one of your friends. Another idea is to run in a race. This can give you a reason to train and keep you interested 15. ____ running.

1. Scientists 2. feel 3. a 4. to buy 5. larger 6. boring 7. swimming 8. shouldn't 9. twice 10. well 11. like 12. makes 13. are 14. or 15. in