Here are the answers to the questions based on your provided text:

2. A person who is driving a motorbike on the road is called **C. motorist**.
3. You should **C. wear** a helmet when you ride a bike or motorbike.
4. He was injured because he didn’t **B. fasten** the seat belt.
5. It is important for a road user to **A. obey** traffic rules.
6. Cyclists must always keep both hands on the **C. handlebars**.
7. You don’t **A. stop** the road when the traffic lights turn red.
8. He is driving his car. She mustn’t go on the **A. road**.
9. Pedestrians are walking across the street at the **A. zebra** crossing.
10. All **C. passengers** for flight VN124 please proceed to gate 5.