Cycling is the ( 41. good ) ………. means of transportation and exercise for three reasons. ( 42. One ) ………. , it is one of the safest forms of exercise. A ( 43. day ) ………. bike ride will help you improve your ( 44. breathe ) ………. ( 45. especial ) ………. if you smoke and ( 46. gent )………. increase your energy. Cycling, therefore, is suitable for people of all ages, but if you have any ( 47. medical ) ………. problems, check with your doctor before you start. Besides ( 48. be ) ………. an excellent form of exercise, cycling allows you to see the country as you ride your bike slowly through small ( 49. quietness ) ……….villages or beautiful forest paths. Cycling is also an easy, convenient and ( 50. Expensive) ………. means of transportation. Ride your bike to school and you never get traffic jam on the way