Two hundred years ago, news between the continents was carried ______.
A. by telephone
B. by land
C. by air
D. by sea
出自:西北大学-行政管理-大学英语(上)

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