问题 选择题

They are broadening the bridge to ________ the flow of traffic.

A.put off

B.turn on

C.speed up

D.work out

答案

答案:C

题目分析:考查动词短语:A. put off推迟,B. turn on打开,C. speed up加速,D. work out制定出,句意:他们正在加宽这座桥,来加速交通的流量。选C。

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