Irregular verbs

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Across
  1. 4. chose
  2. 6. bought
  3. 7. hurt
  4. 9. left
  5. 10. went
  6. 11. drove
  7. 12. gave
  8. 13. heard
  9. 14. began
  10. 15. knew
  11. 16. felt
  12. 17. built
  13. 19. did
  14. 20. ate
  15. 21. could
Down
  1. 1. hit
  2. 2. forgot
  3. 3. became
  4. 4. came
  5. 5. fell
  6. 6. beat
  7. 7. had
  8. 8. drank
  9. 9. learnt
  10. 12. grew
  11. 13. held
  12. 14. brought
  13. 15. kept
  14. 16. found
  15. 18. drew
  16. 21. cut