单项选择题

The main idea of Paragraph 4 is ______.

A．the counterarguments by oil optimists
B．a brief history of oil mining
C．John Felmy's estimation about oil reserves
D．the oil crisis in the 1970s
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单项选择题
The pessimist physicist mentioned in Paragraph 3 says that ______ all the oil in Iraq.
A．each year the world consumes as much oil as
B．since it was discovered, the world has consumed nine times as much oil as
C．the oil that is known to the world but hasn't been mined amounts to more than twice as much as
D．the oil reserves that are still unknown to the world are no less than five times as much as
单项选择题
Advanced technologies can do all of the following EXCEPT that ______.
A．they can find oil deeper in the ground
B．they can increase mining efficiency
C．they can cultivate microorganisms that produce oil
D．they can delay peak oil production
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