单项选择题

Scientists are not sure how serious the effects of global warming will be.

A． Right
B． Wrong
C． Not mentioned
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单项选择题
The people of the coral island nations are unable to do anything substantial about the problem of global warming.
A． Right
B． Wrong
C． Not mentioned
单项选择题
The coral island nations of the Pacific have a long history Of civilization.
A． Right
B． Wrong
C． Not mentioned
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