Bicycles and cars are in the most widely use in our daily life.In my opinion,bicycle is better than car,for it is much more convinient and heathier.I ride to school every day and receiver more excises than those who drive a car.Moreover,the cost of cars is much more large.It's the reason why I prefer bicycle better.However,cars is also play an important role in traffic convey.For example,if you far from the destination,a car will be a better choice.To sum up,it's will be nice that if we can make bicycle and car combine.It can turely be the most convinient.