问题
单项选择题
The early railroads were connected short lines in the existing arteries of transportation: roads, turnpikes, canals, and other waterways.
A．short lines that connected
B．those short lines connected
C．connected by short lines
D．short connected lines
答案
参考答案：A
解析：[分析] 结构应用 本句意为：早期的铁路是些连接已有运输干线的短线，已有的运输干线指公路、收费公路、运河和其他一些水路。主句强调：早期的铁路是些短线，定语“连接已有运输干线的”是修饰short lines的，因此A为答案。