单项选择题

It can be inferred from the passage that______.

A．futures contractors have made profits out of price surges
B．Americans haven't learned to think realistically about oil
C．greedy oil companies have conspired to raise oil prices
D．hydrogen-powered cars would have better mileage

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热门试题

单项选择题

According to the passage, which of the following statements is NOT true

A．Nobody knows for sure whether oil prices will go up or down in the future.
B．China's increasing demand led OPEC to miscalculate production capacity.
C．There has been little gains in average fuel mileage efficiency.
D．The world will depend more on the Persian Gulf in the futur

单项选择题

This passage is most probably written by someone who works for a______.

A．newspaper
B．consulting firm
C．research institute
D．government agency