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. fundamental

D. damaging

* Đáp án

B

* Hướng dẫn giải

detrimental: có hại >< harmless: vô hại

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