Ответ:

  1. Her cow is old. His is young.
  2. Our cake is small. Yours is big.
  3. His rabbit is white. Mine is grey.
  4. Your flower is red. Hers is yellow.
  5. Our horse is black. Theirs is white.
  6. My pencil case is blue. Yours is pink.
  7. Its legs are short. His are long.