Fill in the gaps in the sentences, using must or mustn't.

• Группы
  • must
  • mustn't
• Варианты
  • You ___ obey the Constitution.
  • You _____ sleep during the lessons.
  • You _____ do your homework regularly.
  • You _____ be nice to your teachers and classmates.
  • You _____ fight with your classmates.
  • You _____ chew bubble gum during the lessons.