irregular verbs

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Across
  1. 3. - arrive
  2. 6. - sing
  3. 9. - read
  4. 10. - come
  5. 11. - understand
  6. 13. - tell
  7. 15. - bring
  8. 17. - fly
  9. 19. - build
  10. 20. - keep
  11. 22. - think
Down
  1. 1. - make
  2. 2. - have
  3. 4. eat - don't eat
  4. 5. - hear
  5. 6. - sleep
  6. 7. - give
  7. 8. - go
  8. 9. - run
  9. 12. - sit
  10. 14. - lie
  11. 15. - break
  12. 16. - buy
  13. 17. - feel
  14. 18. - cut
  15. 21. - win