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Must mustn't

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  • You.................... open this door! there is a dog!
    mustn't
  • You ___________ listen to your friends when they are speaking.
    must
  • I ____________ drink water from the lake. It is dirty.
    mustn't
  • To be a doctor you................go to medical school.
    must
  • You _____________ make so much noise.
    mustn't
  • The match isn't free to watch. We................buy the tickets.
    must
  • I ____________ take off my shoes in the house.
    must
  • You.............use your mobile phone in class.
    mustn't
  • You __________ keep quiet in a museum.
    must
  • Students ___________do their HW.
    must
  • I ___________ use my camera here. The sign says no photos.
    mustn't
  • You ____________ chew gum in class
    mustn't
  • You __________ wear a helmet when you ride a bike.
    must