1. 雄鹿   lioness   koala   hedgehog   stag   Hint Half-n-half Clue   2. 獵豹   koala   shark   cheetah   polar bear   Half-n-half Clue   3. 豹   whale   hedgehog   hare   panther   Half-n-half Clue   4. 海狸   hyena   beaver   porcupine   dolphin   Half-n-half Clue   5. 犀牛   rhinoceros   beaver   ox   whale   Half-n-half Clue   6. 北美野牛   bison   stag   bat   gorilla   Half-n-half Clue   7. 北極熊   shark   seal   polar bear   walrus   Half-n-half Clue