Spelling words

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Across
  1. 5. something before a main event
  2. 6. think ahead of time
  3. 9. disagree with
  4. 10. a lawyer
  5. 11. to keep
  6. 13. remove
Down
  1. 1. lack of knowledge
  2. 2. importance
  3. 3. fact or skill
  4. 4. a statement upon witch an argument is
  5. 7. located inside something
  6. 8. general idea
  7. 12. upon