Spelling week 10

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Across
  1. 5. Tools for a task
  2. 7. Of great value
  3. 8. Early look
  4. 11. Heated disagreement
  5. 14. Someone who works for another
  6. 15. Underwater vessel
  7. 16. Paper, pens and envelopes
  8. 17. Needed, essential
  9. 22. Place to view art
  10. 24. Hand in
  11. 26. To be real
  12. 27. Able to do alone
  13. 28. Nice or enjoyable
  14. 30. Sells medicines
  15. 31. Land or area
Down
  1. 1. Finding something new
  2. 2. Expert in a field
  3. 3. Before written history
  4. 4. Words you know
  5. 6. First or main
  6. 9. Happened earlier
  7. 10. Showing courage
  8. 12. Studies the world
  9. 13. Underground train
  10. 16. Title under a heading
  11. 18. Good enough
  12. 19. Person who takes part
  13. 20. Nothing special
  14. 21. Get ready
  15. 23. Scientific test
  16. 25. Study of the past
  17. 29. Extra item