Global Warming Few people now question the reality of global warming and its effects on the world’s climate. Many scientists

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问题                            Global Warming
    Few people now question the reality of global warming and its effects on the world’s climate. Many scientists【C1】______the blame for recent natural disasters on the increase【C2】______the world’s temperatures and are convinced that, more than【C3】______before, the Earth is at【C4】______from the forces of the wind, rain and sun. 【C5】______to them, global warming is making extreme weather events, 【C6】______as hurricanes and droughts, even more【C7】______and causing sea levels all around the world to【C8】______
    Environmental groups are putting【C9】______on governments to take action to reduce the【C10】______of carbon dioxide which is given【C11】______by factories and power plants, thus attacking the problem at its source. They are in【C12】______of more money being spent on research into solar, wind and wave energy devices, which could then replace existing power【C13】______
    Some scientists, 【C14】______, believe that even if we stopped releasing carbon dioxide and other gases into the atmosphere tomorrow, we would have to wait【C15】______hundred years to notice the results. Global warming, it seems, is here to stay.
【C3】

选项 A、yet
B、never
C、once
D、ever

答案D

解析 联系上下文,根据句意,显然作者要表达的是“以往任何时间”,因此选用ever。其他三项均不符合句意。
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