помогите решить, пожалуйста.Exercise 10 p. 118. Fill in the blanks with

Помогите решить, пожалуйста.
Exercise 10 p. 118. Fill in the blanks with must or had (to).
1. 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.


Exercise 11 p. 118. Refer the following to the past. Make all the necessary changes.
1. It is getting pretty late. I must leave, or I shall be late for the last bus. 2. This is getting too far, I feel I must do something before it is too late. 3. It can't go on like this any longer. It must blow up sooner or later. 4. I know it's a secret and I must keep it, 5. He is trying to explain why the measures he proposes must be resorted to if we want to save the situation. 6. He does not understand why such urgent measures as have been taken must be resorted to even in the face of the situation. 7. It is impossible to change anything. One must take things as they are. 8. I do not agree with him that one must always take things as they are without trying to change them. 9. Do you realize that you mustn't mention it to anybody?