Fill in the gaps with the correct past modal: didn't have to, could, able to, had to. 1 A: Did you go shopping after school yesterday B: No, I do my homework. 2 A: I booked them a taxi to the airport. B: You do that. They could have taken the train 3 A: Did it take a long time to travel the length of the Silk Road in ancient times! B: Yes. Camels travel up to 40 miles a day, but the Silk Road was 7,000 miles long! 4 A: How was your walk up Kok Tobe Hill? B: Great! The weather was wonderful and we see the whole of Almaly
