12 questions with 8 fakes

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Across
  1. 3. Which ocean is the largest ocean on Earth
  2. 6. What is shaped like a donut, used by lifeguards to save drowning people
  3. 10. Capital city of Korea
  4. 11. Fastest fish in the world
  5. 12. Shorts worn by men for swimming
Down
  1. 1. an act of running over a short distance at the top speed of the body in a short time.
  2. 2. What is the largest planet in our solar system?
  3. 4. person who ensures the safety of swimmers
  4. 5. A traditional Malay game played with marbles and a wooden plank with holes
  5. 7. A body of flowing water which enters a sea or ocean
  6. 8. Who is the main protagonist in the anime "One Piece"?
  7. 9. Capital of russia