ban (can/ must), We/ smoke in public places., no necessity (need/ have to), You/ wait for more than an hour, strong advice (really must), She/ stop smoking to be healthy, permission (can), They/ park their car here., obligation (must/ suppose), The plane/ land soon, no possibility (can), She/ take bus to school on weekdays, advice (should/ must), You/ take more exercise to be fit, permission (can), We/ pay by credit card in this supermarket, obligation (have to), She/ use special equipment at work, necessity (need/ have to), She/ take time off work to have a rest, ban (can/ must), We/ take registers home, necessity (need/ have to), We/ arrive before 9 a.m., written rule (must), Students/ pay education fees before the course, ban (can/ must), Personnel/ have a smoke at working time, no necessity (need), They / wear a pullover, no possibility, We/ finish our working day earlier, possibility, He/ get a discount if he buys a lot now, strong advice, You/ meet deadlines to get this job, written rule, We/ not arrive late to work, obligation, I/ hand in my report till next Friday.

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