many factors contribute to ___,but the most destructive is the role that humans have played.A.animals to die B.dying animals C.animals died out D.animals dying out为什么选D?

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many factors contribute to ___,but the most destructive is the role that humans have played.A.animals to die B.dying animals C.animals died out D.animals dying out为什么选D?

many factors contribute to ___,but the most destructive is the role that humans have played.A.animals to die B.dying animals C.animals died out D.animals dying out为什么选D?
many factors contribute to ___,but the most destructive is the role that humans have played.
A.animals to die B.dying animals C.animals died out D.animals dying out
为什么选D?

many factors contribute to ___,but the most destructive is the role that humans have played.A.animals to die B.dying animals C.animals died out D.animals dying out为什么选D?
contribute to sth/doing 对··有贡献

许多因素有助于动物的衰灭消失,但是最具破坏性的是···

刚开始我觉得B没什么不对的,后来知道了
B 濒临灭绝的动物,是说动物
D动物的灭绝,是说灭绝

因为contribute to 的to 是介词，后面要跟动词的ing 形式。但它后面如果紧跟名词形式的话就要用动名词表示

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