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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单项选择题

According to the passage, which of the following statements is true

A．How long the oil age will last is simply an academic question.
B．The oil price this year set a new record.
C．Shell Group reduced its reserves to 4.5 billion barrels this year.
D．Economists disagree with one another on how much oil you can realistically min

单项选择题

The author wrote this article to ______.

A．commemorate his teacher
B．recommend this teacher
C．recall his school days
D．describe his school life