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.