Underline the correct item to complete the sentences.
1. You couldn't / didn't have to buy milk - there is still some in the fridge.
2. After two months of intensive physiotherapy my grandfather could / was able to
move from his bed to the bathroom.
3. The conference was scheduled for 9 am so I could / had to be at work at least ten
minutes before.
4. I could / was able to read and write long before I went to school.
5. By the time I was fourteen years old I could / was able to speak three foreign lan-
guages fluently.
6. She started to feel dizzy and could / had to lie down.
7. John did his best but he simply couldn't / didn't have to help them solve their prob-
lems.
8. Although the last contestants started ten minutes after the first ones, they could /
were able to catch up with the group.
9. The worst thing about Kate's previous job was that she was able to / had to wear a
uniform.