13. Вставьте модальные глаголы to have to или to be to.1. Where ____ the lecture to take place? — I suppose in the assembly hall. 2. So, our plan is as follows: I ____ to go to the library and bring the books. You ____ to look through all the material here. Later we ____ to work together. 3. "You ____ to do it alone, without anybody's help," she said sternly. 4. I ____ to help my friends with this work now, so I cannot go with you. 5. It was raining hard and we ____ to wait until it stopped raining. 6. 1 ____ to ask him about it tomorrow, as today he has already gone. 7. Why didn't you tell me that I ____ to buy the books? 8. According to the order of the schoolmistress all the pupils ____ to return the library books before the twenty-third of May. 9. As we had agreed before, we ____ to meet at two o'clock to go to the stadium together. But Mike did not come. I waited for another half-hour, but then I ____ to leave as I was afraid to be late. 10. The meeting ____ to begin at five o'clock. Don't be late.