'quién', 'dónde', 'cuál'

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Across
  1. 1. where do you go to the doctor
  2. 3. where it hides underground
  3. 4. where treasures are hidden
  4. 5. who takes what does not belong to him
  5. 8. is spent where it is received
  6. 9. who attends
Down
  1. 1. which mystery solved
  2. 2. who drinks water with his tongue
  3. 6. who takes people flying
  4. 7. where he works besides the restaurant