There are no solitary, free-living creatures; every form of life is ______ other forms.

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问题 There are no solitary, free-living creatures; every form of life is ______ other forms.

选项 A、dependent to
B、depended to
C、depended on
D、dependent on

答案D

解析句意：不存在孤立生存的生物，任何生命形态都是依赖于其他生命形态而存在。be dependent on依赖于，取决于。

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