Richard's and Luke's crossword puzzle

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Across
  1. 2. what can possibly happen
  2. 4. crowd of people
  3. 5. child over 18 years old.
  4. 7. a place where you can work
Down
  1. 1. where cars drive
  2. 3. where animals are kept captive
  3. 6. huge building
  4. 8. translation of schließlich