假如你是李明，你將參加班里組織的主題為"Let's Ride Bicycles"的英語演講比賽。請根據下面內容提示撰寫一篇演講稿，號召同學們騎車出行。
內容要點：
1.汽車的普及造成了空氣污染和交通堵塞等問題；
2.騎自行車出行具有節能環保、有利健康等好處。
參考詞匯：
交通堵塞（traffic jams）；節能（energy saving）；環保（environmental protection）
寫作要求：
1.詞數不少于80詞；
2.開頭已經寫好，不計入總詞數；
3.文中不能出現考生姓名和學校名稱。

Let's Ride BicyclesDear friends，
   As we know，with the improvement of people's living standards，cars have become a popular means of transport，bringing great convenience to our life.__________

【考點】應用文；厲行節約．

【答案】I'm Li Ming．The topic of my speech is"Let's ride bicycle"．
    As is known to all，with the improvement of people's living standards，cars have become a popular means of transport，bringing great convenience to our life．However，they have also caused some problems，such as air pollution and traffic jams．
    How can we solve the problems then？As far as I am concerned，riding bicycles is a good solution．For one thing，bicycles don't need any petrol and they are energy-saving．For another，bicycles are environmentally friendly because they won't give off waste gas．What's more，riding bicycles is a good way for us to exercise and it is beneficial to our health．
    Therefore，let's take the responsibility to build up a low-carbon city by riding bicycles．Come on and join us!
Thank you!