题目内容：

根据句意及首字母填空：

One day, we were talking happily in the classroom when Ms James walked in. She looked pale because she saw an a1.just now.

At that time, she was waiting to c2. the road. A boy was r3. his bike and listening to music on the road. It was very dangerous. While the lights were changing to red, a car s4.appeared round the corner. It wasn’t going fast, but it didn’t stop. The driver was talking on his mobile phone. Luckily, the car stopped j5.in time, but the boy fell off h6. bike and hurt his knee. T7.was too bad.

So when you are on your bike, think a8. the risk of an accident! Stop at the red lights.You should always be c9. Don’t ride too fast. Don’t ride side b10. side with your friends, and don’t listen to music!