It is widely known that the excessive use of pesticides is producing a detrimental effect on the local groundwater.

Câu hỏi :

It is widely known that the excessive use of pesticides is producing a detrimental effect on the local groundwater.

A useless 

B harmless           

C damaging                      

D fundamental

* Đáp án

B

* Hướng dẫn giải

Phương pháp giải:

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