The rate of racial progress varies in different areas of the country, but in the past ten years ____

题目简介

The rate of racial progress varies in different areas of the country, but in the past ten years ____

题目详情

The rate of racial progress varies in different areas of the country, but in the past ten years _________ more improvement.
A.there isB.it isC.there have beenD.there has been
题型:单选题难度:中档来源:不详

答案

D
考察时态。In the past ten years与现在完成时连用,结合句意可知D正确。句意:在过去十年中,已经有了更多的进步。

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