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Have to / Don't have to

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  • You ________ smoke on buses.
    mustn’t
  • Teachers ________ to work on Sunday.
    don’t have to
  • Machine workers ____________ work when they are tired.
    mustn't / don't have to
  • Student __________ wear uniforms at school.
    have to
  • The museum is free. You _______ pay.
    don't have to
  • You ________ drop litter here. It's against the rules!!
    mustn't
  • It's a great book! You _______ read it.
    must
  • We ____________ obey the traffic police.
    have to
  • You __________ clean the floor. I've already done it.
    don't have to
  • You _______ park here. It's an emergency exit.
    mustn't