题目内容：

假定你是李华，近期你看到了共享单车（shared bikes）“绿色出行”的宣传后决定改变出行方式，并发现骑单车的许多好处。请你就此为校刊“英语园地”写一篇短文。

注意：

1.词数100左右；

2.可适当增加细节，以使行文连贯。

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