MODAL VERBS: obligation prohibition and permission
Help
You _________________ make a reservation if you want to go hiking in the most popular areas of New Zealand.
HAVE TO
A good sense of humour is important, even in business. You _____________________________________ serious all the time.
DON'T HAVE TO
You ________________ bathe and sunbathe naked in Australia and the UK, but only on special "nudist beaches".
CAN
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