单项选择题

What can be inferred about coaches and wagon freighters as the railroad expanded

A．They developed competing routes.
B．Their drivers refused to work for the railroads.
C．They began to specialize in private investment.
D．There were insufficient numbers of people to take them.

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单项选择题

All of the following facts about the telegraph and the Internet are true EXCEPT the fact that ______.

A．both develop from the most advanced science of their time
B．they are operated similarly in technical terms
C．both help to change the way we do business and communicate
D．both facilitate the communication between cultures and ethnic groups

单项选择题

What is the relevance to our own time of the struggles of telegraph pioneers

A．They made today's technology work efficiently.
B．They smooth the way for the popularity of today's technology.
C．They made the Internet a global network.
D．They overcame national and international bureaucratic obstacles.