Cover of the textbook English Grammar in Use

The key answer of exercise 32.2

The key to exercise solutions in chapter Unit 32 - must / mustn't / needn't for the textbook English Grammar in Use with authors Raymond Murphy from Cambridge University Press

Question

Which is correct?

Answer

  1. needn't
  2. must
  3. mustn't
  4. don't need to
  5. mustn't
  6. needn't
  7. mustn't
  8. don't need to
  9. needn't / must