After years of negotiation, an international agreement to conserve ______ species and ecosystems has finally been changed.

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问题 After years of negotiation, an international agreement to conserve ______ species and ecosystems has finally been changed.

选项 A、ventilated
B、imperiled
C、utilized
D、modified

答案B

解析 ventilated通风的。imperiled处于危险中的。utilized被利用的。modified修改的,变更的。
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