Rewrite the sentences to make them refer to the past. 1) I must do this task in time.
2) I have to take the pills three times a day.
3) They must be away on holiday.
4) We can’t see the top of the mountain.
5) He can’t be a millionaire.
6) We mustn’t shout in the classroom.
7) You needn’t buy any food.
8) You should be more careful.
9) You don’t have to do this exercise.
10) They can’t get married during the term of their contracts.