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We ____________________ ____________________ ____________________ wear a uniform at our school . ( mustn't / don't have to ) .

Sarah ____________________ ____________________ cycle to school because there isn't a bus . ( has to / can ) .

They ____________________ leave by 6 pm or they'll miss the train . ( must / can ) .

I ____________________ read your writing . What does it say ? ( mustn't can't )

You ____________________ walk in the park at night . It's dangerous . ( don't have to / mustn't )

Sally ____________________ play the guitar very well . ( can / must )