Jun's crossword puzzle

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Across
  1. 4. apologize meaning Korean
  2. 7. you+use water like sea
  3. 8. country, famous of salmon
Down
  1. 1. most a lot of people live
  2. 2. rival of apple
  3. 3. 0×0×0+5-4+6×1×1×1×1×1×1×1×1
  4. 5. round food, Italy food
  5. 6. paper, most student hate