3 Choose the correct options to complete the sentences.
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 grandparents 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 You mustn’t / don’t have to be cross with your mum. She was just trying to help.
7 Do you have to / Should you wear school uniform at your school?
8 This cake is really stale, so you should / shouldn’t eat it.