Modals in English sentences – Exercise

Which of the three sentences containing a modal has the same meaning as the original one?

1. They are able to speak English well.

2. Steve is not allowed to stay out late.

3. Do I have to clean the kitchen?

4. Are you able to drive a tractor?

5. We are not allowed to swim when the red flag is flying.

6. She is not able to read Chinese.

7. Do you think we are allowed to park here?

8. You don't have to do this exercise.

9. We have to stop when the traffic lights are red.

10. Am I allowed to ask a question?