You might as well expect a river to flow backward us carrying out the plan.
A. than stop
B. as to stop
C. as stop
D. so as to stop
网友回答
A. than stop
B. as to stop
(答案→)C. as stop
D. so as to stop
解析：考查惯用法。might as well do...as do...是一个句型，表示“做……与（做）……一样”。