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

A．put off B．speed up

C．turn on D．work out

 

B

【解析】B　[考查短語(yǔ)動(dòng)詞的辨析。句意：他們正在拓寬橋梁以加快交通流量。put off推遲；speed up加快；turn on打開(kāi)(水、電視、收音機(jī)、燈、煤氣等)，(使)感興趣； (使)興奮；work out算出，實(shí)現(xiàn)。]

 

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