Ba's Christmas Mystery

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Across
  1. 3. The aplha of the black and white herd.
  2. 4. An 8 letter word that contains all 26 letters.
  3. 7. It can't talk but will reply when spoken to.
  4. 8. I'm found in socks,scarves and mittens; and often in the paws of playfull kittens.
Down
  1. 1. The more of this there is, the less you see.
  2. 2. What building has the most stories?
  3. 5. It is the symbol to learn; but better not find half a worm.
  4. 6. What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?