The Fun They Had

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Across
  1. 3. improve
  2. 4. to argue
  3. 7. figure out
  4. 10. better
Down
  1. 1. usual, typical
  2. 2. by use of machines
  3. 5. person who makes sure things are working
  4. 6. something used without result
  5. 8. hundreds of years of time
  6. 9. to put in