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  3. As he has done frequently over the last 18 months, Andy Roost drove his blue diesel Peugeot 205 onto a farm, where signs pointed

As he has done frequently over the last 18 months, Andy Roost drove his blue diesel Peugeot 205 onto a farm, where signs pointed

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问题    As he has done frequently over the last 18 months, Andy Roost drove his blue diesel Peugeot 205 onto a farm, where signs pointed one way for "eggs" and another for "oil.
   He unscrewed the gas cap and chatted casually as Colin Friedlos, the proprietor, poured three large jugs of used cooking oil — tinted green to indicate environmental benefit — into the Peugeot’s gas tank.
   Mr. Friedlos operates one of hundreds of small plants in Britain that are processing, and often selling to private motorists, used cooking oil, which can be poured directly into unmodified diesel cars, from Fords to Mercedes.
   The global recession and the steep drop in oil prices have now killed many of those large refining ventures. But smaller, simpler ones like Mr. Friedlos’s are moving in to fill the void with their direct-to-tank product, with a flood of offers of free oil from restaurants.
   Used cooking oil has attracted growing attention in recent years as a cleaner, less expensive alternative to fossil fuels for vehicles. In many countries, including the United States, the oil is collected by companies and refined into a form of diesel. Some cities use it in specially modified municipal buses or vans. And the occasional environmentalist has experimented with individually filtering the oil and using it as fuel.
   Peder Jensen, a transport specialist at the European Environment Agency, said that cooking oil fuel was "feasible" for diesel engines — Rudolf Diesel predicted that his engine, patented in the 1890s, would run on it — and that it was, "from an environmental point of view, a good idea, taking this waste and making it useful. "
   Others disagree. Stuart Johnson, manager of engineering and environment at Volkswagen of America, called putting raw vegetable oil in cars "a bad idea" and said, "We don’t recommend it. " The inconsistent quality of cooking oil fuel, he said, means that " it may contain impurities and it may be too viscous," especially for newer, more complex diesel engines with injection systems.
   "None of that seems to stir concern in Mr. Nicholson, the Welsh entrepreneur. " He said. " There is a lot of resistance," he said, " to putting something into your precious car that you brewed in the kitchen sink.
Unlike those large refining ventures, Mr. Friedlos’s plant______.
选项 A、has been enjoying an economic revival
B、operates for protecting the environment
C、produces its product at a very low cost
D、has switched to serve private motorists
答案C
解析 本题是细节事实题，考查对第四段最后一句话的理解，关键点：…with a flood of offers of free oil from restaurants…。
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