7 66.13.1 Choose the correct item.
1 You have to/mustn't eat a healthy breakfast
every morning
V
2 You must/mustn't be careful with what you
eat.
3 We mustn't/have to exercise every day for
at least 30 minutes.
4 You must/mustn't go to the doctor when
you have a cold.
1) mustn't
2) must
3) have to
4) must