Answer Key

Exercise

Fill in the missing preposition. Fill in "_" if no preposition is needed.
  1. She is  [like] her brother. Very unreliable!
  2. Do you work  [on] Saturdays?
  3. They go there  [_] every Wednesday.
  4. He'll be back  [in] a moment.
  5. He opened the door  [with] a special key.
  6. We went to bed  [at] midnight.
  7. The bank is  [on] fire!
  8. I met him  [in] 1986.
  9. I found the letter  [by] chance.
  10. What are you going to do  [at] Christmas?