In paragraph 2, non-native species are mentioned as 

Câu hỏi :

In paragraph 2, non-native species are mentioned as 

A a kind of harmless animals 

B an achievement of human beings

C a harmful factor to the environment 

D a kind of useful plants

* Đáp án

C

* Hướng dẫn giải

Phương pháp giải:

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