单选题 Once a proposal goes into its place, it's not likely to {{U}}reverse{{/U}} it.

【正确答案】 C

【答案解析】[分析] 动词辨析 reverse表：颠倒，使变得相反，彻底改变；A．enhance提高，增强；B．implement贯彻，实现，执行；C．overthrow打倒，推翻，颠覆；D．provoke激怒，挑拨，驱使；因此C为答案。