7th M5 S3

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Across
  1. 3. water + air + land
  2. 4. waste
  3. 7. a place where we go to read books
  4. 9. simple past of "understand"
  5. 12. simple past of "throw"
Down
  1. 1. noun of the verb "advise"
  2. 2. Adjective of "help"
  3. 5. opposite of "lazy"
  4. 6. organised
  5. 8. synonym of "fresh"
  6. 10. opposite of "clean"
  7. 11. synonym of "protect"