第20题: [单项选择]Both police officers and high officials here are susceptible to corruption. A. sustainable B. suspicious C. skeptical D. vulnerable 参考答案:D 答案解析:susceptible易受影响的。四个选项:vulnerable易受攻击的;sustainable可以忍受的,足以支撑的,养得起的;suspicious可疑的,怀疑的,一般与of连用; skeptic