‘i’ before ‘e’ except after ‘c’

1234567891011121314151617181920
Across
  1. 2. Made with cement.
  2. 3. A break for lunch and play.
  3. 6. Honour won by great achievement.
  4. 9. To be given something.
  5. 10. Move slowly and carefully.
  6. 13. Proof of purchase.
  7. 16. The lowland between two mountains.
  8. 17. Lets out smoke.
  9. 19. Harsh.
  10. 20. A great celebration of food.
Down
  1. 1. Not lasting for long.
  2. 4. Not containing anything.
  3. 5. A form of currency.
  4. 7. Trickery.
  5. 8. Recalling an old thought.
  6. 11. There are four in one year.
  7. 12. A narrow passageway.
  8. 14. The top surface of a room.
  9. 15. Become aware of.
  10. 18. Travel from one place to another.