1. 海豚   dolphin   bat   koala   toad   Hint Half-n-half Clue   2. 驯鹿   dolphin   octopus   jackal   reindeer   Half-n-half Clue   3. 北极熊   polar bear   octopus   walrus   antelope   Half-n-half Clue   4. 蟾蜍   jackal   toad   hedgehog   mare   Half-n-half Clue   5. 河马   seal   hippopotamus   ox   antelope   Half-n-half Clue   6. 猎豹   ass   kangaroo   mare   cheetah   Half-n-half Clue   7. 黑猩猩   panther   octopus   chimpanzee   hyena   Half-n-half Clue