You must wear a hat when it’s very hot., It is necessary to wear a hat when it’s very hot., You can take a lunch box to school., It is allowed to take a lunch box to school., You can’t visit the museum on Sundays., It isn’t possible to visit the museum on Sundays., You must switch off your mobile phone in the hospital., It is the rule to switch off your mobile phone in the hospital., You mustn’t bring your pet into this shop., It isn’t allowed to bring your pet into this shop., You can find what you’re looking for at the mall., It is possible to find what you’re looking for at the mall.

prime time 1 unit 4 can, can't, must, mustn't

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