第1篇（共享单车）Bike-sharingToday, as a greener means of transportation, bike-sharing is becoming more and more popular in many cities.?Its known that?it has many advantages. So it is enjoyed by lots of people.First of all,?its very convenient for?people to go somewhere. Also, it helps toreduce the traffic pressure.?There will be less pollution because of bike-sharing. Besides, bike-sharing helps people take more exercise. In this way, its helpful to peoples health.However, it also brings some problems. For example, some people throw them away after using bikes. ?Even some people destroy them, and some bikes are stolen by thieves.In my opinion, everyone should try to?be civilized?and follow these rules of using bikes. ?As long as?we?take good care of?bikes, they will make our life better and better, and our environment will be more beautiful.