sub

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Across
  1. 3. lower in rank or position.
  2. 4. underground train.
  3. 6. A shot (punctures).
  4. 8. colder than cold.
  5. 9. Taking advantage of someone.
Down
  1. 1. a plant room and agriculture.
  2. 2. When someone doesn't know what their doing.
  3. 4. A boat under the ocean.
  4. 5. to go underwater.
  5. 7. a learning section.