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Traffic conditions in Beijing ________ for decades. At first people only complained about jams during rush hours,but today every hour is rush hour.
A.is worseningB.have worsened
C.have been worseningD.worsened
C

试题分析:考查现在完成进行时。本题的关键词是for decades多年以来,该时间状语常常与现在完成时连用。而根据句意指多年以来一直都在变得更糟糕,故使用现在完成进行时。句意:北京的交通情况多年以来一直都在变糟糕。起初的时候,人们只是抱怨交通堵塞高峰期。但是现在每个时候都是高峰期。故C正确。
点评:现在完成进行时表示动作从过去开始,一直持续到现在。
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