问题
选择题
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
答案
答案：C
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。