题目内容：
Some historian say that the most important contribution of Dwight Eisenhower’s presidency (总统任期) in the 1950s was the U.S. interstate highway system.It was a ____ project, easily surpassing the scale of such previous human ____ as the Panama Canal. Eisenhower’s interstate highways ____ the nation together in new ways and ____ major economic growth by making commerce less ____. Today, an information superhighway has been built—an electronic network that ____ libraries, corporations, government agencies and ____. This electronic superhighway is called the Internet, ____ it is the backbone (主干) of the World Wide Web.The Internet had its ____ in a 1969 U.S. Defense Department computer network called ARPAnet, which ____ Advanced Research Projects Agency Network. The Pentagon built the network for military contractors and universities doing military research to ____ information. In 1983 the National Science Foundation (NSF), ____ mission is to promote science, took over.
This new NSF network ____ more and more institutional users, may of ____ had their owm internal networks. For example, most universities that ____ the NSF network had intracampus computer networks. The NSF network ____ became a connector for thousands of other networks. ____ a backbone system that interconnects networks, internet was a name that fit.
So we can see that the Internet is the wired infrastructure (基础设施) on which web ____ move. It began as a military communication system, which expanded into a government-funded ____ research network.
Today, the Internet is a user-financed system tying intuitions of many sorts together ____ an “information superhighway.”
A．concise
C．massive
B．radical
D．trivial
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