Cover of the textbook English Grammar in Use

The key answer of exercise 23

The key to exercise solutions in chapter Additional exercises for the textbook English Grammar in Use with authors Raymond Murphy from Cambridge University Press


Put the verb into the correct form, active or passive.


  1. was built
  2. built
  3. have sold / sold
  4. has been sold / was sold
  5. are made
  6. might be stolen
  7. must have been stolen
  8. must have taken
  9. can be solved
  10. should have left
  11. is delayed
  12. is being built; is expected