题目内容：

Good morning, everyone,

I am Li hua from Xingguang Middle School. The topic of my speech is “Let’s Ride Bicycles”.

As 1. (know) to us all, 2. the improvement of people’s living standards, cars 3. (become)a popular means of transport, 4. (bring) great convenience to our life. 5., they have also caused some problems such as air pollution and traffic jams.

How can we solve the problems then? As far as I 6.(concern), bicycles is a good solution. For one thing, bicycles don’t need any petrol and they are energy-saving. For 7. , bicycles are 8. (environment) 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.

9. , let’s take the 10. (responsible) to build up a carbon city by riding bicycles. Come on and join us!

Thank you!