Riding a bike is the least expensive way to travel around,and it can be of great benefit to our health,however,safety must come first when we ride a bike.We must keep on going the special

lane for bicycle and take care of the traffic lights and pedestrains.We mustn't ride too fast or let our hands go off the handle bars,otherwise ,an accident may eaisly take place.besides,we must pay attention while riding and try to keep away from traffic and people..of course ,carrying is