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Across
  1. 3. a __ of icebergs.
  2. 5. a __ of alligators.
  3. 7. a __ of canyons.
  4. 8. an __ of children
Down
  1. 1. a __ of diagnosticians
  2. 2. an __ of leaves.
  3. 3. a __ of actors.
  4. 4. an __ of graduates.
  5. 6. a __ of collective nouns.