1you have to/mustn't eat a healthy breakfast
every morning.
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. ​

alexvip7777ap    1   13.01.2020 14:28    2