完形填空。
Perhaps you ride a bicycle to school. Riding a bicycle can be great fun. Do you know how to ri
de
a bicycle
1 ?
Careful boys and girls learn to ride their bicycle well
2 they go out on the road. How can you
tell
3 you are a good rider?
If you can ride a bicycle in a straight line, you can ride well. If you can't ,you should practise riding
4 a safe place. To be safe on a bicycle, you
5 to use both hands and both feet.
6 your
feet on the pedals and your hands on the handle bars at all times.
Do you have a basket on your bicycle? If so, put your books and packages in it. Then you can
7 both hands on the handle bars.
You know that your bicycle is built for one person. It is not safe to carry anyone
8 you.
9 is this
so? Keep
10 
safe by safety rules when you ride on a bicycle. Watch where you are going at all times.
( )1. A. safe
( )2. A. as soon as
( )3. A. that
( )4. A. in
( )5. A. must
( )6. A. Keep
( )7. A. keep
( )8. A. to
( )9. A. Where
( )10. A. it