You... have a passport to travel abroad., have to, Mustn't, People... travel on public transport without a ticket., mustn't, need to, We... get up early yesterday, because there was no school. , didn't have to, need to, You... finish your homework. The teacher wants to check it tomorrow., don't have to, must, You...wear trainers for PE lessons., mustn't , have to, 6. Students... take extra classes if they like. , can, must, Students... go barefoot in school., have to, can't.

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