单选题 Once a proposal goes into its place, it's not likely to reverse it.
A．enhance B．implement C．overthrow D．provoke

【正确答案】 C
【答案解析】[解析] 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。