Building dams on rivers for electric power and irrigation can harm ecosystems (28) _______

Câu hỏi :

Building dams on rivers for electric power and irrigation can harm ecosystems (28) _______ the rivers.

A. on

B. around

C. over

D. under

* Đáp án

B

* Hướng dẫn giải

around sth: xung quanh cái gì

Chọn B

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