2. 外语
  3. For more than a century the road was the【C1】______form of land transportation in much of the world. It was, and【C2】______, the o

For more than a century the road was the【C1】______form of land transportation in much of the world. It was, and【C2】______, the o

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问题     For more than a century the road was the【C1】______form of land transportation in much of the world. It was, and【C2】______, the one land carrier that can carry almost anything【C3】______the tracks go and do it【C4】______a true cost lower than【C5】______types of land or air transportation.
    Today, however, other modes of transportation have been developed to the【C6】______at which they can do certain transportation jobs more【C7】______than the railroads. Pipelines can carry liquids and【C8】______solids over long distances【C9】______. Airplanes, with their great speed, can carry some types of【C10】______, valuable freight at a savings; and trucks offer speed and【C11】______, especially for shorter hauls. The private automobile,【C12】______over modern highways, and the airplane have taken over much【C13】______traffic formerly handled on rails. The bus is an effective【C14】______for the short-to-medium-distance passenger business. The modern barge (驳船), operating on improved【C15】______waterways systems, can move many commodities over specific routes at very low cost.
   【C16】______, these competitors of the railroad can do a better job on some types of transportation【C17】______. The development of these newer modes,【C18】______, has changed the role of the railroad from【C19】______of the general purpose carrier to that of a more specialized carrier, just【C20】______the other modes are specialized.
【C4】
选项 A、by
B、in
C、to
D、at
答案D
解析 词语搭配。本题考查介词与名词习惯搭配。cost的搭配介词有at和to。根据句子所要表达的意思，选项为at，作“以……为代价”解。to one’s cost意为“付出了代价，吃了苦头”。故选D。
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大学英语四级

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