Q4:
In the past the country of Siduria has relied heavily on imported oil. Siduria recently implemented a program to convert heating systems from oil to natural gas. Siduria already produces more natural gas each year than it burns, and oil production in Sidurian oil fields is increasing at a steady pace. If these trends in fuel production and usage continue, therefore, Sidurian reliance on foreign sources for fuel should decline soon.
Which of the following is an assumption on which the argument depends?
E. All new homes that are being built will have natural-gas-burning heating systems
答案是B, 我选了A, 到底那里不对呢?请哪位大侠帮忙讲讲!
答案是A,讨论过。
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