第33题: [单项选择]They believe that the merchants had conspired to undermine the nation's economic independence. A. uphold B. minimize C. weaken D. postpone 参考答案:C 答案解析:[解析] undermine削弱……的基础,用阴险手段毁损、伤害(健康等),暗中破坏。weaken (削弱、减弱)符合题目要求。其他选项分别为:uphold支持,维护,维持,保持; minimize把