What do you know about the USA?

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Across
  1. 3. the number of quarters in New York
  2. 5. a very famous annual sport meeting
  3. 8. the capital city of the USA
  4. 9. the name given to the high buildings
  5. 11. the first president of the US
  6. 14. the capital city of the state of New York
  7. 16. the smallest state
  8. 17. the word for taxi in New York
  9. 20. the place where the President lives
  10. 21. the number of British colonies before independence
Down
  1. 1. July,4th, 1776
  2. 2. the name of the US flag
  3. 4. the name of one district of New York
  4. 6. a synonym for neighbourhood or district
  5. 7. the business district of New York
  6. 10. July, 1969
  7. 12. the biggest state
  8. 13. Puritans who emigrated to the US in the 18th century
  9. 15. He abolished slavery in 1863
  10. 18. the name of one state that is not on the continent
  11. 19. the number of states in the USA