Here are the best answers for each question:

1. **D. rules** - The traffic rules tell people to do, warns about possible dangers.
2. **B. taking** - What must you do before you turn left or right when taking a motorbike?
3. **B. frightening** - That horror film is too frightening for me.
4. **C. boring** - The films was so boring that we almost fell asleep.
5. **A. disappointed** - Critics were all disappointed at their performance on the stage yesterday.
6. **C. prize** - The biggest prize for the winner is a trip to France.
7. **B. attend** - A lot of people go to the city center to attend the festival.
8. **A. have** - It must be hard to see elephants racing in the street.