Which do you think is better: must or should?

1. You know, I think you _______ take a holiday.
2. Tell Mark he ___________ tidy his room at once.
3. Visitors are reminded that the __________ keep their bags with them.
4. I’m sorry, but you_____ go. We have private matters to discuss.
5. I really ______ go on a diet. I’ll start today!
6. I suppose I______ write to Aunt Rachel one of these days.
7. You absolutely_____ check the tyres before you take the car out today.
8. All officers_____ report to the Commanding Officer by midday.
9. You_____ have your hair cut at least once a month.
10. I think men____ wear jackets and ties in restaurants.