单项选择题

We can infer from the passage that______.

A．concentrations of greenhouse will become worse
B．Concentrations of greenhouse will become better
C．generally there is no rain in Antarctica
D．the North Pole is no longer covered with ice

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单项选择题

According to scientists, to keep down concentrations of greenhouse gases, we should______.

A．stop gas emissions
B．lower the temperature
C．reduce the use of coal, oil, and gas
D．cut off the use of coal, oil, and gas

单项选择题

Which of the following suffered the greatest economic loss in the 10 hottest years

A．The Midwestern.
B．The southern United States.
C．Walt Disney World’s water parks.
D．Insurance Companies.