单项选择题

It can be learned from the passage that oil exploitation beneath ANWR' s frozen earth ______.

A．involves a lot of technological problems
B．remains a controversial issue
C．is expected to get under way soon
D．will enable the U.S. to be oil independent

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单项选择题

Those against oil drilling ANWR argue that ______.

A．it will drain the oil reserves in the Alaskan region
B．it can do little to solve U.S. energy problem
C．it can cause serious damage to the environment
D．it will not have much commercial value

单项选择题

What do the environmentalists mean by saying Not so fast ( Linel, Para. 3 )

A．Don't be too optimistic.
B．Don' t expect fast returns.
C．The oil drilling should be delayed.
D．Oil exploitation takes a long time.