What they will see may be very surprising. Even Steger doesn’t know exactly what to expect. Climate change has already reshaped the geography of the Arctic.

　　“Within a decade or less, it’s going to be impossible to reach the North Pole by dog team without flotation(漂浮), ” says Steger.

　　Climate change is happening, but people can change, too. Their willingness to change will determine the shape of the Earth’s future.

　　56. Why is Steger about to organize the adventure to the Arctic?

　　A. To collect evidence for his scientific research.

　　B. To develop the young people’s adventurous spirit.

　　C. To let more people enjoy its natural beauty.

　　D. To let people realize the bad effects of global warming.

　　57. How can people learn about the progress of Steger’s journey?

　　A. Through radio programs.

　　B. By watching TV.

　　C. On the Internet.

　　D. By reading their journals.

　　58. Global warming will lead to many unexpected events except that　.

　　A. the North Pole adventure team led by Steger are not sure about what they are going to see

　　B. it will be impossible to reach the North Pole just by dogsleds since the sea ice around the North Pole will be melted

　　C. the animals living in the Arctic are going to face great dangers because their living environment changes

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