問題詳情

[B]Polar bear deaths due to global warming are of increasing concern. New studies also show that polar bears are on the __24— of extinction. Most dangerous is the fact that as global warming increases, polar bears will have a difficult time —25— food. In reality, numerous polar bears are feeling the effects of a shortage of food and facing starvation.There are around 20,000 polar bears in the wild and they depend upon the arctic weather for their livelihood. Because of global warming, a large amount of Arctic ice is melting away and the northern seal population is _26一. Polar bears are thus rapidly decreasing in number since they have fewer places to live in and less food to eat. So fast 27— dying that they could disappear forever within decades.Actually, polar bears are not the only victims of global warming since it is a universal problem. _28— with other natural disasters, global warming affects our planet at a rather gradual pace. Slow _29一，global warming may eventually destroy our planet. This deadly warming is caused by the huge amount of carbon dioxide —30— into the atmosphere by the burning of fuels.This carbon dioxide absorbs the sun，s heat and keeps it from escaping into space, thus warming the Earth. As the planet warms up, tons of ice surrounding the North Pole and the South Pole has begun to melt, resulting in worldwide sea levels —31—. Small islands and low-lying coastal areas could soon besubmerged, and residents in these areas are —32— to be left homeless by the end of the 21st century. Also, global warming can cause severe climate change—abnormal weather disturbances. If global warming keeps worsening, food shortages are just one of the great tragedies that we will experience in the near future, just as many polar bears have already done. —33—，it might just be our turn to bid farewell to the Earth.
24.
(A)danger
(B) risk
(C) brink
(D) mercy

參考答案

答案：C[無官方正解]
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)

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