1. Ann will have to stay and warn him.
2. The concert must begin at seven sharply.
3. It is not the best way, I must say.
4. I couldn't meet her last night, I had to work.
5. George had to arrive in Rome some days ago and meet us there.
6. You must do as they tell you.
7. This must be the most interesting book in the library.
8. She wanted her daughter to live in the capital, but it was not a must.
9. Our mother was taken to the hospital and I had to write about this to my sister.
10. Sam must have known her address.
Объяснение:
