Are You an Italian Insider ?

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Across
  1. 4. afternoon nap
  2. 6. river of rome
  3. 7. romantic boat ride in venice
  4. 9. Thank You
  5. 11. informal way to say hello or goodbye
  6. 12. where gladiators fought
  7. 13. a fast car
  8. 15. italian fast food
  9. 16. a famous cheese
  10. 17. what Adele likes to drink
  11. 18. please (two words 3,5)
Down
  1. 1. boss of the Vatican
  2. 2. exit
  3. 3. the ? hills of rome
  4. 5. let's go
  5. 8. good morning
  6. 10. milk
  7. 14. An original renaissance man
  8. 15. sandwich
  9. 19. water