Homphone puzzle

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Across
  1. 2. / It has seven days in it
  2. 3. / If you smash something you....it
  3. 4. / If you kill lots of people you are a.....killer
  4. 7. / You eat these in the morning
  5. 10. / American money
  6. 11. / You do this when you speak to God
  7. 12. / The letter has been....in the post
Down
  1. 1. / I see through them
  2. 2. / If you are not strong you are...
  3. 3. / Slam them on in a car
  4. 4. / You smell this
  5. 5. / Reference to myself
  6. 6. / You start a letter with this
  7. 8. / You have these in your house
  8. 9. / Bambi was one
  9. 11. / A bird that kills is a bird of......