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 Passage Two
Questions 26 to 30 are based on the following passage:
An important new industry, oil refining, grew after the Civil War. Crude oil, or petroleum—a dark, thick ooze（渗出物，分泌物）from the earth—had been known for hundreds of years. But little use had ever been made of it. In the 1850’s Samuel M. Kier, a manufacturer in western Pennsylvania, began collecting the oil from local seepage 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,a retired railroad conductor.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 products such as waxes and lubricating oils. Petroleum was not then used to make gasoline or heating oil.
26.According to the passage, many people initially thought that E. L. Drake had made a mistake by ____.
A) moving Pennsylvania
B) retiring from his job
C) searching for oil
D) going on a whaling expedition
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27.According to the passage, what is “black gold”?
A) Gold ore. B) Sstolen money.
C) Whale oil. D) Crude oil.
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28.Why does the author mention the California gold rush?
A) To indicate the extent of United States mineral wealth.
B) To argue that gold was more valuable than oil.
C) To describe the mood when oil was first discovered.
D) To explain the need for an increased supply of gold.
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29.The author mentions all of the following as possible products of crude oil EXCEPT____.
A) gasoline B) kerosene
C) wax D) plastic
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30.What might be the best title for the passage?
A) Oil Refining: A Historical Perspective.
B) Kerosene Lamps: A Light in the Tunnel.
C) The California Gold Rush: Get Rich Quickly.
D) Private Property: Trespassers Will Be Prosecuted.