Другие ответы:
1) I knew it can`t be true.
2) The doctor said, "The child is very ill. He must be taken to the hospital at once.
3) I had to wait for you but I couldn`t as I was in a hurry.
4) May/can I open the window? It`s rather hot here.
5) This matter should be discussed in tomorrow's debate.
6) You shouldn`t argue with your father: you must obey him.
7) She sees very badly, so she has wear glasses all the time.
8) The doctor told the sick man, "You don`t have to smoke so many cigarettes" (вообще, должно быть must или should, но так как стоит "to"...)
9) You mustn't drive a car at night without lights.
10) Man can't live by bread alone.