问题
选择题
In the past few years, __________much improvement in the traffic.
A．there has been
B．there has had
C．there have been
D．there had been
答案
答案：A
题目分析：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。