irregular verbs

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Across
  1. 2. cut
  2. 3. blew
  3. 5. ring
  4. 9. become
  5. 11. forget
  6. 12. take
  7. 14. be
  8. 17. put
  9. 18. cost
  10. 19. begin
  11. 21. do
Down
  1. 1. build
  2. 4. write
  3. 6. bring
  4. 7. eat
  5. 8. see
  6. 9. bite
  7. 10. buy
  8. 13. keep
  9. 14. win
  10. 15. speak
  11. 16. find
  12. 19. break
  13. 20. give