Group 4 and 5

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Across
  1. 2. A place where books are kept
  2. 3. Able to be accepted as true
  3. 6. A rubber sack that fills with air or gas
  4. 8. A flash of electricity during a storm
  5. 10. A butterfly or moth larva
  6. 12. To pay attention to sound
  7. 15. In good physical or mental condition
  8. 16. Lines or paths that never meet
  9. 17. The sound made when something is funny
  10. 18. More than usually; particularly
  11. 19. Free time for rest or fun
Down
  1. 1. Worth a lot or very important
  2. 4. A reason or meaning given for something
  3. 5. Harmful substances in the environment
  4. 7. The first of its kind; not a copy
  5. 9. Words and grammar used to communicate
  6. 10. Without any colour
  7. 11. Very good; outstanding
  8. 13. To draw or explain with pictures
  9. 14. Very bad or unpleasant