Echange

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Across
  1. 5. to operate
  2. 8. to confess
  3. 9. to chew
  4. 10. shower
  5. 11. to worry
  6. 13. secondary school
  7. 14. to smile
Down
  1. 1. to stammer
  2. 2. behaviour
  3. 3. misunderstanding
  4. 4. oyster
  5. 6. everywhere
  6. 7. to yawn
  7. 12. shell
  8. 15. to react