unit 6 puzzle

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