题目内容：
根据材料，回答问题。Last year I caught the baby cuckoo and put it in a cage outside．Later its mother flew from the cage with food in her mouth．I was happy to see this，because of the mother bird knew much better than I did to feed her baby．But the following morning I found the baby bird died．I told the story of my bird to my biology teacher and he explained that what had happened．A mother cuck00，finds her baby in a cage，will bring it poison food．She believes it is good for her baby to die than to live in a cage．I still feel sorry for what I do to the bird．
56．________
参考答案：
答案解析：