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精英家教網 > 高中英語 > 題目詳情

【題目】They use computers to keep the traffic smoothly. k

A. being run B. run

C. to run D. running

【答案】D

【解析】

試題分析:這兒構成keep+賓語+doing固定用法。現在分詞作動詞keep的賓語補足語。trafficrun之間是主動關系,所以用現在分詞。

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