单选题The drunk driver is 

问题补充：

单选题Thedrunkdriveris___forthetrafficjamyesterday.A.to blame; occurredB.to blame; occurringC.to be blamed; occurredD.to be blamed; occurring

答案：

B解析be to blame为习惯用法，表示”应受责备”；第二空应填occuring，为现在分词短语作后置定语，相当于定语从句that occurred。