Soft 'c': ce, ci, cy

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Across
  1. 4. the month after November
  2. 5. added to food to give it more flavour
  3. 6. a chemical that has a sour taste
  4. 8. the period of 100 years
  5. 9. a muscle located on your upper arm
  6. 12. the middle of something
Down
  1. 1. gets mixed and hardens to become concrete
  2. 2. one hundred of these add up to one dollar
  3. 3. an award given to celebrate success
  4. 7. when something is covered in ice
  5. 8. a shape that has no corners
  6. 10. the life ______ of the butterfly is fascinating
  7. 11. erasable tool used for writing