In the past few years, __________much improvement in the trafficA.there has beenB.there has hadC.there have beenD.there had been
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A解析试题分析：考查时态和there be 句型：句意：在过去的几年中，在交通方面有很多改善。时间状语是in the past few years和现在完成时连用，还有这句话是there be 句型，谓语和be动词后面的主语much improvement一致，因为是抽象名词，所以用has，选A。考点：考查时态和there be 句型