past tense crossword

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Across
  1. 1. lay
  2. 3. learn
  3. 5. know
  4. 7. forget
  5. 8. become
  6. 11. sleep
  7. 12. have
  8. 13. stand
  9. 14. wake
  10. 15. drink
  11. 16. cost
  12. 20. ring
  13. 21. undergo
  14. 22. creep
Down
  1. 1. break
  2. 2. say
  3. 4. lend
  4. 6. get
  5. 8. meet
  6. 9. speak
  7. 10. trhow
  8. 12. feed
  9. 13. understand
  10. 15. teach
  11. 17. put
  12. 18. tear
  13. 19. go
  14. 20. sing