the hotel reception is open 24 hours, so we [can / have to] call them at any time., can, have to, There’s a taxi here now, so we [can’t / don’t have to] call one., can’t, don’t have, I [need to / don’t have to] book a hotel because I’m not staying tonight., need to, don’t have to, You [need to / can] check in before they tell you your room number., need to, can, They lock the front door at midnight, so you don’t [need to / have to] use a key after that., don’t need to, have to, We [can’t / don’t have to] serve breakfast because the chef hasn’t arrived., can’t, don’t have to, People [mustn't / don't have to] talk loudly in the library., mustn't, don't have to, People [mustn't / don't have to] buy books. They can borrow them from the library., mustn't, don't have to

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