Ответ:
1. We had to wait for the doctor for a long time yesterday.
2. They have to meet at three p.m.
3. You can talk to her tomorrow.
4. Can I call you next week?
5. Can you help me with this paper tomorrow morning?
6. She must have been studying hard to achieve such good results.
7. Could I borrow your umbrella, please?
8. He must have gone already, though he may be still waiting.
9. The children were allowed to watch TV last night.
10. I have to get up at 6 a.m. My working day begins at 8.
11. In a month she will be able to play the piano again.
Объяснение: