单项选择题

Many experts hold that the forthcoming decline of polar bears is______.

A．directly caused by the diminishing Arctic ice
B．directly caused by the atmospheric buildup of heat-trapping gases
C．a symbol of the weather change
D．absolutely based on the emission of heat-trapping gases

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单项选择题

Which of the following is TRUE about the Interior Department according to the passage

A．It is concerned about global warming all the time.
B．It is efficient in probing into the cause of the melting ice.
C．It issued the proposal out of great sense of responsibility.
D．It is somehow inactive in prescribing the solution to the problem.

单项选择题

What does Kert Davies mean by saying the administration was clearly scrambling for credibility of any kind in this issue

A．The administration wants to guarantee authority in this issue.
B．The administration strives to make its proposal persuasive to some extent.
C．The administration tries to work out effective solution to the problem.
D．The administration has lost its credit in some way.

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