Many people and organizations have been making every possible effort in order to  save _______

Câu hỏi :

Many people and organizations have been making every possible effort in order to  save _______ species.

A. endangered

B. dangerous

C. fearful

D. threatening

* Đáp án

A

* Hướng dẫn giải

endangered species: loài có nguy cơ tuyệt chủng

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