Поделитесь своими знаниями, ответьте на вопрос:
Complete these sentences with must or have to (in the correct form), Sometimes it is possible to use either; sometimes only have to is possible.
4. have to
5. had to
6. must/have to
7.must/have to
8.had to
9.must/have to
10.
11. had to
12.