1. 母牛   lizard   leopard   cow   crocodile   Hint Half-n-half Clue   2. 老鼠   frog   mouse   zebra   wolf   Half-n-half Clue   3. 鳄鱼   buffalo   elephant   crocodile   sheep   Half-n-half Clue   4. 狮子   alligator   lion   tiger   crocodile   Half-n-half Clue   5. 豹子   leopard   donkey   pig   fox   Half-n-half Clue   6. 老虎   leopard   fox   bear   tiger   Half-n-half Clue   7. 小马   pony   elephant   sheep   squirrel   Half-n-half Clue