China’s first train from Beijing to Tibet ________ on Saturday carrying business travelers on the world’s highest railway.A.set aboutB.set outC.set downD.set up
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B解析本题考查短语动词辨析。set out“出发;起程”;set about“着手做某事”;set down “写下;制定”;set up“建立;设置”。句意为:“中国第一辆由北京开往西藏的列车在世界上最高的铁路上满载旅客出发了。”