Question

Ex.1
0 My mum's a doctor, so she often must/has to work at weekends.
1 I must/don't have to write and thank my parents for my birthday presents.
2 The train leaves at 6, so we mustn't/ ought to be late.
3 You should have to go for a run if you want a bit of exercise.
4 Everyone ought / should to try and eat lots of fruit and vegetables every day.
5 We've got plenty of time, so we don't have to / mustn't run.
6 Do you have to / Should you wear school uniform at your school?​

Answer 1

От должно быть все ясно наверное