If people keep polluting the rivers, no fish there will survive .
A. at all costs
B. once in a while
C. in the long run
D. by no means
网友回答
A. at all costs
B. once in a while
(答案→)C. in the long run
D. by no means
解析：in the long run终究，最后，从长远看。at all costs不惜任何代价；once in a while偶尔，有时；by no means决不，一点也不。