Confusing words

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Across
  1. 3. “Shatter”
  2. 6. “Before this time”
  3. 9. “Quantity (countable)”
  4. 11. “Article used before a vowel”
  5. 12. “In the middle of two”
  6. 13. “Be permitted to”
  7. 16. “Total sum”
Down
  1. 1. “Slow down mechanism”
  2. 2. “Not including”
  3. 4. “Okay, informally”
  4. 5. “Know how to”
  5. 6. “First letter of the alphabet”
  6. 7. “Surrounded by”
  7. 8. “Carry away”
  8. 10. “Deliver here”
  9. 14. “Agree to take”
  10. 15. “Common misspelling of ‘a lot’”
  11. 16. ready: “Completely prepared”