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  3. Some historians say that the most important contribution of Dwight Eisenhower’s presidency (总统任期) in the 1950s was the U. S. int

Some historians say that the most important contribution of Dwight Eisenhower’s presidency (总统任期) in the 1950s was the U. S. int

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问题     Some historians 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【C1】______ project, easily surpassing the scale of such previous human【C2】______ as the Panama Canal. Eisenhower’s interstate highways【C3】______ the nation together in new ways and【C4】______ major economic growth by making commerce less【C5】______ Today, an information superhighway has been built—an electronic network that【C6】______ libraries, corporations, government agencies and【C7】______ . This electronic superhighway is called the Internet,【C8】______ it is the backbone (主干) of the World Wide Web.
    The Internet had its【C9】______ in a 1969 U. S. Defense Department computer network called ARPAnet, which【C10】______ Advanced Research Projects Agency Network. The Pentagon built the network for military contractors and universities doing military research to【C11】______ information. In 1983 the National Science Foundation (NSF) ,【C12】______ mission is to promote science, took over.
    This new NSF network【C13】______ more and more institutional users, many of【C14】______ had their own internal networks. For example, most universities that【C15】______ the NSF network had intra-campus computer networks. The NSF network【C16】______ became a connector for thousands of other networks.【C17】______ 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【C18】______ move. It began as a military communication system, which expanded into a government-funded【C19】______ research network.
    Today, the Internet is a user-financed system tying institutions of many sorts together【C20】______ an " information superhighway".
【C20】
选项 A、into
B、amid
C、over
D、toward
答案A
解析 介词辨义。空格处前面提到“互联网将各种各样的机构连接在一起”，空格后面则提到“一条信息高速公路”。从句意看，后者是前者产生的结果。四个介词中只有into能够表达“形成”这个意思，所以本题正确答案为A项。amid意为“在……中”，over意为“在……之上，越过”，toward意为“朝，向”。这三个词均不符合题意。
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