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  3. Not long ago, Barack Obama was hoping that high-speed trains would provide America with the desired benefits. First, building th

Not long ago, Barack Obama was hoping that high-speed trains would provide America with the desired benefits. First, building th

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问题    Not long ago, Barack Obama was hoping that high-speed trains would provide America with the desired benefits. First, building the special tracks and locomotives would put a division or two of America’s army of unemployed back to work. Then, once built, the trains would get people out of cars and planes and to their destinations in a way that would be cleaner and use less foreign oil. But those dreams have mostly died. Republicans have decided that government spending, not outdated infrastructure, is the real problem, and Republican governors in Florida, Wisconsin and Ohio have rejected federal money to begin building.
   Only in California does the dream live on. As Governor Jerry Brown, aged 73 and a Democrat, likes to remember, another big railway project in the 19th century connected the young state to the rest of America. Of late, he has compared his state’s planned high-speed train to the Panama and Suez canals.
   California’s voters used to agree. In a 2008 ballot measure, they approved $9 billion in bonds to fund just such a train. As advertised, it was to connect the two big population centres, Los Angeles and the San Francisco Bay area. The project was to cost $33 billion and be completed as early as 2020.
   Then the iron law of infrastructure projects asserted itself. According to current estimates, the train would in fact cost three times as much or more, and take 13 years longer to build. Mr. Obama still wants to help; he has asked Congress for $35 billion in railway funding over five years, of which $3.5 billion may go to California. But even with the bond funds, those dollops would cover less than 13% of the estimated cost. Republicans are in no mood to allocate more.
   It gets worse. After the ballot measure, it was decided that construction should begin not in the two population centres but in the vast and flat farmlands of the Central Valley, where building is much easier. A highspeed train would then run through sparsely populated countryside, with hardly anybody riding it. Some call this a "train to nowhere" , others a white elephant. Using a rather more original metaphor Richard White, a professor of history at Stanford, calls it "a Vietnam of transportation: easy to begin and difficult and expensive to stop" .
   
It can be learned from Paragraph 4 that Republicans are reluctant to allocate more since_____.
选项 A、high-speed train belongs to infrastructure
B、high-speed train would cost three times as much or more
C、high-speed train would take 13 years longer to build
D、the existing bond funds are far from estimated cost
答案D
解析 推断题。根据题干关键词定位至第四段。最后一句提到的Republicans are in no mood to allocate more与题干同义，因此原因从前面找。修建高铁花费大和耗时长不是问题，问题是资金不够。即便奥巴马已经向国会申请了约35亿美元用于加利福尼亚州高铁建设，但这些费用仍然远远不够预计的支出。且文章第一段就提到“共和党人决定政府开支不应花在过时的基础设施建设上”，因此D项为正确答案。
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