单选题 One reason that reform is called ______ is that it costs so much to run ______ political office.

【正确答案】 B

【答案解析】[名师精解] call for表示“提倡，要求”，run for表示“竞选”。 [解题秘籍] 有关call的其他搭配有：call on号召；call at访问，打电话给某人；call off取消，放弃。