题目内容
【题目】They use computers to keep the traffic ________ smoothly.
A. being run B. run C. to run D. running
【答案】D
【解析】
试题分析：考查非谓语动词辨析。keep sb./sth. doing sth.表示“让……一直做……”。句意：他们用电脑让交通保持顺畅。选D项。
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题目内容
【题目】They use computers to keep the traffic ________ smoothly.
A. being run B. run C. to run D. running
【答案】D
【解析】
试题分析：考查非谓语动词辨析。keep sb./sth. doing sth.表示“让……一直做……”。句意：他们用电脑让交通保持顺畅。选D项。