Crossword Challenge

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Across
  1. 4. LAND AREA
  2. 6. 2008 OLYMPICS
  3. 9. A TIBETAN HERD
  4. 11. OUTBACK BIRD
  5. 12. END OF A TRAIN
  6. 13. TAKE ADVANTAGE OF
  7. 16. LARGE CITY IN CALIFORNIA
  8. 18. FROZEN WATER
  9. 19. CANOE MOVERS
  10. 20. HIBERNATING MAMMALS
  11. 21. CITY NEAR THE GREAT SPHINX
  12. 22. LARGEST LAND MAMMAL
  13. 25. ONCE MORE
  14. 27. ACTRESS THOMPSON
  15. 30. GRAZING GROUND
  16. 31. TRANSLUCENT GEM
  17. 32. NOT REAL
  18. 33. UNITED STATES POSTAL SERVICE
  19. 35. MONTH THE DECLARATION OF INDEPENDANCE WAS SIGNED
  20. 37. SEA EAGLE
  21. 38. OPPOSITE OF HOT
Down
  1. 1. SMALL BIRD
  2. 2. HUE AQUA
  3. 3. PLACE TO STORE HAY
  4. 5. FAMOUS JANE AUSTEN CLASSIC
  5. 6. SWIMMING METHOD
  6. 7. HOUND DOG
  7. 8. DOWN UNDER NATIVE
  8. 10. OPPOSITE OF NORTH
  9. 14. SOME LEGAL CASES
  10. 15. KILLER WHALE
  11. 16. INDIAN WOMAN WITH LEWIS AND CLARK
  12. 17. CAPITAL OF CANADA
  13. 23. LONG HAIRED CAT
  14. 24. CORN HOME
  15. 26. RESIDUE IN A FIREPLACE
  16. 28. ITALY
  17. 29. ONE HUNDRED YEARS
  18. 31. ATE IN HIGH STYLE
  19. 34. SPRING BULB
  20. 36. ALTERNATIVE TO BURRITO
  21. 39. JOURNEY SEGMENT