They missed the last bus. They … to walk. *

Might
Had
Could​

Had

Объяснение:

Модальный глагол have to

1.if you travel to central australia you'll see ayers rock 2. if you go to tasmania you won't see tasmanian wolves. 3.if people don't hunt crocodiles the number of crocodiles will grow.

2. went

3. have you ever been

4. went

5. have sold

6. did you sell

7. sold

8. went

9. haven't been

10. have never seen