unit 6 puzzle

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Across
  1. 2. complete one's studies and receives a certificate or diploma
  2. 3. extremely bad or evil
  3. 4. opposite
  4. 6. make sb behave in a more polite way
  5. 7. a person who studies the nature and meaning of existence, reality, moral,etc.
  6. 12. happening or existing without stopping
  7. 13. general principles or ideas of a subject
  8. 14. shake slightly
Down
  1. 1. strange
  2. 5. realize or notive sth
  3. 8. happening by itself without being planned
  4. 9. paid work
  5. 10. a creature that is ugly and frighening
  6. 11. a person who studies economics
  7. 15. a way from one place to another