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They are broadening the bridge to ________ the flow of traffic.(2011·山东)

A.put off B.speed up

C.turn on D.work out

 

B

【解析】B [考查短语动词的辨析。句意:他们正在拓宽桥梁以加快交通流量。put off推迟;speed up加快;turn on打开(水、电视、收音机、灯、煤气等),(使)感兴趣; (使)兴奋;work out算出,实现。]

 

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