You should be aware that this rare bird was on the list of human (protect) ______.

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问题 You should be aware that this rare bird was on the list of human (protect) ______.

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答案protection

解析 本题空格前的human为形容词,空格处需要一名词作为其修饰的对象,protect为动词原形,其名词形式为protection。
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