1. 如今，很多城市出现了一种绿色出行方式——共享单车(bike-sharing)，它因环保、便捷而备受青睐，但同时也引发了—些问题。请你根据要点提示以"Bike-sharing"为题写一篇英语短文，表达自己的看法和建议。80词左右，开头已给出，不计入总词数。

【要点提示】

Advantages	convenient; less pollution; reduce the traffic pressure(减缓交通压力); take exercise…
Problems	throw away; damage; be stolen…
Advice	civilized(文明的); follow the rules; take good care of…

Today, as a greener means of transportation, bike-sharing is becoming more and more popular in many cities.