选择填空:阅读下面的对话或句子,从A、B、C三个选项中选出一个能填入空白处的最佳选项。<div>
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Goods are carried by several<u></u>of transport--on road or rail, by sea or air.
(analysis)
.means
.roads
.ships

出自:2024年国家开放大学答案