1. 北极熊   reindeer   kangaroo   polar bear   otter   Hint Half-n-half Clue   2. 鲨鱼   toad   octopus   shark   cheetah   Half-n-half Clue   3. 海象   stag   walrus   bulldog   rhinoceros   Half-n-half Clue   4. 袋鼠   kangaroo   ox   penguin   walrus   Half-n-half Clue   5. 豪猪   porcupine   kangaroo   shark   ox   Half-n-half Clue   6. 犀牛   jackal   rhinoceros   panda   polar bear   Half-n-half Clue   7. 驴子   bison   ass   hedgehog   kangaroo   Half-n-half Clue