阅读下面短文，根据短文内容填空，在未给提示词的空白处仅填写1个适当的单词，在给出提示词的空白处用括号内所给词的正确形式填空。

Imprinting is a form of learning in 【小题1】 a very young animal fixes its attention on the first object it has visual, auditory, or tactile experience with and then follows that object. Over the last few months, panda caretakers in China 【小题2】 (dress) up like the animal to make back-to-nature training more authentic for the cubs. The keepers wear panda costumes when dealing with the animals to try to make the pandas feel at home and to limit their interactions 【小题3】 humans. They hope the dress-up will make the animals’ transition to the wild 【小题4】 (easy) in the long run.