Irregular verbs in past participle

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Across
  1. 1. chosen
  2. 3. given
  3. 4. done
  4. 6. found
  5. 7. eaten
  6. 9. met
  7. 11. been
  8. 12. broken
  9. 14. paid
  10. 15. sold
  11. 16. drawn
  12. 17. written
  13. 20. begun
Down
  1. 2. seen
  2. 3. gone
  3. 4. driven
  4. 5. had
  5. 8. got
  6. 10. taken
  7. 11. built
  8. 12. bought
  9. 13. spoken
  10. 15. sat
  11. 18. run
  12. 19. felt