(2014·东北三省三校一联)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 worsening B．have worsenedC．have been 题目和参考答案——青夏教育精英家教网—

题目内容

(2014·东北三省三校一联)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 worsening　B．have worsened

C．have been worsening　D．worsened

【解析】考查动词的时态。由空后的for decades可推知，此处要用完成时态，故可以排除A、D两项。由下句内容可知，北京这种交通状况是从过去一直持续到现在，且会持续下去，故应该用进行时态。

答案：　C

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