1. 考拉   cheetah   koala   hyena   mare   Hint Half-n-half Clue   2. 北美野牛   bison   polar bear   toad   shark   Half-n-half Clue   3. 熊貓   panda   hare   rhinoceros   antelope   Half-n-half Clue   4. 海豚   antelope   dolphin   hyena   otter   Half-n-half Clue   5. 黑猩猩   rhinoceros   ox   chimpanzee   toad   Half-n-half Clue   6. 大猩猩   gorilla   seal   toad   reindeer   Half-n-half Clue   7. 豪豬   porcupine   hyena   hippopotamus   panther   Half-n-half Clue