Goods are carried by several ________ of transport--on road or rail, by sea or air.

A、means
B、roads
C、ships
出自:国家开放大学理工英语21

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块