翻译题 Flames are carried on foot by runners, but other modes have also been used.
【正确答案】 D
【答案解析】分析句子结构可知，本句是一个but连接的并列句，前后两个分句之间是转折关系。on foot可译为“徒步”；runners可译为“跑步者”；other modes have also been used可译为“也用了其他的交通工具”。故选D。