It’s necessary to wear a helmet. - You ___ wear a helmet, can, must, may, I’m allowed to take a day off. - I ___ take a day off, should, may, must, I want to help you. - I ___ help you, can, must, should, It was possible for him to come yesterday. - He ___ come yesterday, can, could, must, Giving advice - You ___ eat more fruit, can, should, may.

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