Many species of animals are threatened and could easily become (33) ______ if we do not make an effort to (34) ______them.

Câu hỏi :

Many species of animals are threatened and could easily become (33) ______ if we do not make an effort to (34) ______them.

A empty 

B vanished 

C disappeared 

D extinct

* Đáp án

D

* Hướng dẫn giải

Phương pháp giải:

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