1. 河马   lioness   hippopotamus   beaver   shark   Hint Half-n-half Clue   2. 海象   walrus   panther   whale   bulldog   Half-n-half Clue   3. 袋鼠   cheetah   kangaroo   panther   reindeer   Half-n-half Clue   4. 北美野牛   chimpanzee   bison   gorilla   cheetah   Half-n-half Clue   5. 豪猪   porcupine   ass   cheetah   gorilla   Half-n-half Clue   6. 考拉   hare   lioness   koala   toad   Half-n-half Clue   7. 雄鹿   stag   porcupine   whale   toad   Half-n-half Clue