Fill in the blanks with must or had (to).
When 1 asked him why he was so late, he told me that he had missed an earlier train and ... wait for another one. 2, The man warned us that the place was dangerous to bathe in and we ... look for a safer spot. 3. His wife kept telling him that he ... not sit up so late. 4. The doctor told him he ... give up smoking, as it might be ruinous to his lungs. 5. The father said to the children that they ... be careful while crossing the street. 6. The bus was not going that direction, so he ... change. 7. It was not that the work ... be finished soon, but we ourselves wanted to be through with it as soon as possible. 8. 1 had no special desire to do it, but as I felt it ... be done this way or another, I started on it, though reluctantly. 9. I saw that I ... speak louder to make myself heard. 10. Telling himself that he ... control himself, he did not answer anything. 11. Martin knew that he ... stand up to be introduced. 12. For a moment she felt her heart ... break.