Irregular verbs in past

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Across
  1. 1. tell
  2. 3. drink
  3. 6. sing
  4. 8. swim
  5. 9. speak
  6. 10. write
  7. 12. forget
  8. 13. go
  9. 16. think
  10. 17. give
Down
  1. 1. take
  2. 2. do
  3. 4. run
  4. 5. know
  5. 6. sleep
  6. 7. buy
  7. 8. see
  8. 11. teach
  9. 14. eat
  10. 15. up wake up