The early railroads were connected short lines in the existing arteries of transportation: roads, turnpikes, canals, and other w

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问题 The early railroads were connected short lines in the existing arteries of transportation: roads, turnpikes, canals, and other waterways.

选项 A、short lines that connected
B、those short lines connected
C、connected by short lines
D、short connected lines

答案A

解析 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。
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