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  3. An important new industry, oil refining, grew after the Civil War. Crude oil

An important new industry, oil refining, grew after the Civil War. Crude oil

游客2023-09-12  22
问题     An important new industry, oil refining, grew after the Civil War. Crude oil, or petroleum a dark, thick ooze from the earth had been known for hundreds of years, but little use had ever been made of it. In the 1850’s Samud M. Kier, a manufacturer in western Pennsylvania, began collecting the oil from local scapages and refining it into kerosene. Refining, like smelting, is a process of removing impurities from a raw material.
    Kerosene was used to light lamps. It was a cheap substitute for whale oil, which was becoming harder to get. Soon there was a large demand for kerosene. People began to search for new supplies of petroleum.
    The first oil well was drilled by E.L. Drake. In 1859 he began drilling in Titusville, Pennsylvania. The whole venture seemed so impractical and foolish that onlookers called it "Drake’s Folly". But when he had drilled down about 70 feet (21) meters, Drake struck oil. His well began to yield 20 barrels of crude oil a day.
    News of Drake’s success brought oil prospectors to the scene. By the early 1860’s these wildcatters were drilling for "black gold" all over western Pennsylvania. The boom rivaled the California gold rush of 1848 in its excitement and Wild West atmosphere. And it brought far more wealth to the prospectors than any gold rush.
    Crude oil could be refined into many products.  For some years kerosene continued to be the principal one. It was sold in grocery stores and door-to-door. In the 1880’s and 1890’s refiners learned how to make other petroleum products such as waxes and lubricating oils. Petroleum was net then used to make gasoline or heating oil. [br] Which of the following words could best replace the word "one" (Underlined)?
选项 A、Oil.
B、Door.
C、Store.
D、Product.
答案 D
解析 做这类题目时，首先找到该代词所在的位置，并把上下文的句子仔细研读。它们所提供的线索和提示会告诉我们这个陌生单词的意思。特别是该代词前面的名词短语或从句。一般来说，这类题日的答案都能在同一句话的主语或宾语，或者在前一句话的主语和宾语中找到。仔细阅读完前面的句子后，我们可以得知这里one指的是product。故本题的正确答案是D。
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