1 Acupuncture might/may/could help to relieve migraines, but I am not convinced.
2 I was so furious I had to count to ten before I replied.
3 Dan must/has to see a doctor. He is always exhausted.
4 You needn’t/don’t have to/don’t need to get angry. Take it easy!
5 If you want to, you could try hypnotherapy.
6 Visitors mustn’t swim in the Sulphur Bath. It is dangerous!
7 Robert can’t play rugby as he has a bad back.
8 Kiera can’t/mustn’t go scuba diving because of an ear infection.
9 Tracey can’t have been dancing in the club as she is studying for exams.
10 You should/ought to go and see a doctor.