单选题China ________ rapid econ

问题补充：

单选题China________rapideconomicdevelopmentandpoliticalstabilityoverthepastthreedecades,butwiththem________somesocialproblems.A.has seen; has comeB.had seen; are comingC.saw; will comeD.has seen; have come

答案：

D解析考查时态。over the past three decades表明句子用现在完成时，some social problems作主语，谓语动词用复数，所以选D。