学进去

根据短文《Riding a bike》, 将句子补充完整。
Riding a bike is really exciting. You can go to places far from your house, you can go out to play with your friends, and you can…
But before you go, learn some tips about bikes:
You need a bike just right for you. Riding a too big bike is not safe.
Bikes can break down. You need to learn to look after your bike.
Bikes use the roads. You need to learn the rules of the road.
You should wear bright colours over your clothes, so the drivers can see you easily.
Bikes can be dangerous. You must wear a helmet to protect your head.
You need to keep yourself safe when you are riding a bike. You need to be careful all the time.
1. Bikes can break down. You need to                                 .
2. Bikes use the roads. You need to                                   .
3. You should                          , so the drivers can see you easily.
4. Bikes can be dangerous. You must                            .
5. When you are riding a bike, you need to                     all the time.