51. 某英文报社正在举办题为“Green Transportation” 的征文活动。请就此题目写一篇英文短文应征，内容包括：

你对绿色出行的理解

你会选择怎样的绿色出行

理由是什么

Everyone has his or her own green transportation. Some like taking public   transportation, while others fancy taking a walk to school or work. If you ask   me what my green transportation is, my answer would be riding a bicycle. It is   to be noted that riding a bicycle is one of the most popular ways to get a round   in city. And it has a lot of benefits. This essay will illustrate these benefits   as follows.

To keep a green environment in our life, riding a bicycle is the best way.   Firstly, riding a bicycle can be faster than taking a bus when there is a   traffic jam. Secondly, I can make myself stronger by cycling. Finally, I can   make friends who are bicycle lovers and do cycling trip together.

In short, riding a bicycle is the best green transportation. I shall keep up   riding a bicycle to get a round in city because its environment-friendly and   beneficial to me.