单项选择题

If the percentage of carbon dioxide in the air continues to increase at current rates ______.

A．average daily temperatures worldwide could increase considerably
B．some sea level islands could be threatened by flooding
C．all coastal regions throughout the world could be at serious risk
D．all of the above
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单项选择题
Based upon the content of the article, it can be assumed that the writer ______.
A．would actively involve herself in actions designed to bring the rain forest problem to the attention of governments worldwide
B．has little interest in the destruction about which she is writing
C．obtained a few facts and produced a story with no basis in reality
D．is only satisfied when creating stories which are intended to frighten people
单项选择题
According to the information contained in the article, tropical deforestation ______.
A．will continue relentlessly and cannot be prevented
B．may have critical consequences for the survival of mankind
C．is not a really serious problem and reports have been widely exaggerated
D．is necessary for the economic development of non-industrialized countries
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