Modals with “Not” 1 - Must not, Do not have to

Choose the best modal for each sentence.

Which is best: don't have to or mustn't ?

  1. You ________ pass a test to ride a bicycle.
    1.   don't have to
    2.   mustn't
  2. You ________ smoke in a gas station.
    1.   don't have to
    2.   mustn't
  3. You ________ be late for class, or the teacher will be angry.
    1.   don't have to
    2.   mustn't
  4. Shops ________ sell cigarettes to children.
    1.   mustn't
    2.   don't have to
  5. You ________ live in Canada to study at the ZbEnglish.net Website. You can take a course by Internet.
    1.   mustn't
    2.   don't have to
  6. You ________ buy the text book for this course -- you can borrow mine.
    1.   don't have to
    2.   mustn't
  7. You ________ unplug the computer while it is turned on.
    1.   mustn't
    2.   don't have to
  8. Canadians ________ get a visa to travel to the US.
    1.   don't have to
    2.   mustn't
  9. This bus is free! You ________ buy a ticket.
    1.   mustn't
    2.   don't have to
  10. In Canada, employers ________ discriminate against women or minorities. It's against the law.
    1.   mustn't
    2.   don't have to