听力原文：
Passage One

During the Arctic winter from October to March, the average temperature in the frozen north typically hovers around minus 20 degrees Celsius. But this year, the Arctic is experiencing much higher temperatures. On February 20, the temperature in Greenland climbed above freezing or zero degree Celsius and it stayed there for over 24 hours. Then, on February 24^th, the temperature on Greenland northern tip reached 6 degree Celsius. Climate scientists described the phenomenon as stunning.
Weather conditions that drive this bizarre temperature surge have visited the Arctic before. They typically appear about once in a decade. However, the last such increasing temperature took place two years ago. This is troubling as climbing Arctic temperatures combined with rapid sea-ice loss are creating a new type of climate feedback loop which could accelerate Arctic warming. Indeed, sea-ice cover in the Arctic is melting faster than expected. Without those masses of cooling sea ice, warm air brought to the Arctic can penetrate further inland than it ever did before. The air can stay warmer, and longer too. This drives additional melting.
Overall, Earth is warming at a rapid pace — 2014 through 2017 rank as the hottest years on record — and the Arctic is warming twice as fast as anyplace else on Earth. This raises unique challenges for Arctic wildlife and indigenous people who depend on Arctic ecosystems to survive. Previously, climate forecasts predicted that Arctic summer ice would disappear entirely by around 2060. But based on what scientists are seeing now, the Arctic may be facing summers without ice within 20 years.

Q9：What did climate scientists describe as "stunning"?

短文开头提到，北极的冬季是从10月到来年的3月，期间平均气温是-20℃左右，但今年，北极的气温要高很多。2月20日，格陵兰岛的气温攀升至冰点(0℃)以上，并且持续了24小时。然后在2月24日，该岛北端的气温达到6℃。气候科学家形容这一现象“令人吃惊”。因此答案为A。

听力原文：
Passage One

During the Arctic winter from October to March, the average temperature in the frozen north typically hovers around minus 20 degrees Celsius. But this year, the Arctic is experiencing much higher temperatures. On February 20, the temperature in Greenland climbed above freezing or zero degree Celsius and it stayed there for over 24 hours. Then, on February 24^th, the temperature on Greenland northern tip reached 6 degree Celsius. Climate scientists described the phenomenon as stunning.
Weather conditions that drive this bizarre temperature surge have visited the Arctic before. They typically appear about once in a decade. However, the last such increasing temperature took place two years ago. This is troubling as climbing Arctic temperatures combined with rapid sea-ice loss are creating a new type of climate feedback loop which could accelerate Arctic warming. Indeed, sea-ice cover in the Arctic is melting faster than expected. Without those masses of cooling sea ice, warm air brought to the Arctic can penetrate further inland than it ever did before. The air can stay warmer, and longer too. This drives additional melting.
Overall, Earth is warming at a rapid pace — 2014 through 2017 rank as the hottest years on record — and the Arctic is warming twice as fast as anyplace else on Earth. This raises unique challenges for Arctic wildlife and indigenous people who depend on Arctic ecosystems to survive. Previously, climate forecasts predicted that Arctic summer ice would disappear entirely by around 2060. But based on what scientists are seeing now, the Arctic may be facing summers without ice within 20 years.

Q10：What does the passage say about the temperature surge in the Arctic?

短文中提到，导致气温飙升的天气情况此前曾在北极出现过，通常每十年就会出现一次。因此答案为C。

听力原文：
Passage One

During the Arctic winter from October to March, the average temperature in the frozen north typically hovers around minus 20 degrees Celsius. But this year, the Arctic is experiencing much higher temperatures. On February 20, the temperature in Greenland climbed above freezing or zero degree Celsius and it stayed there for over 24 hours. Then, on February 24^th, the temperature on Greenland northern tip reached 6 degree Celsius. Climate scientists described the phenomenon as stunning.
Weather conditions that drive this bizarre temperature surge have visited the Arctic before. They typically appear about once in a decade. However, the last such increasing temperature took place two years ago. This is troubling as climbing Arctic temperatures combined with rapid sea-ice loss are creating a new type of climate feedback loop which could accelerate Arctic warming. Indeed, sea-ice cover in the Arctic is melting faster than expected. Without those masses of cooling sea ice, warm air brought to the Arctic can penetrate further inland than it ever did before. The air can stay warmer, and longer too. This drives additional melting.
Overall, Earth is warming at a rapid pace — 2014 through 2017 rank as the hottest years on record — and the Arctic is warming twice as fast as anyplace else on Earth. This raises unique challenges for Arctic wildlife and indigenous people who depend on Arctic ecosystems to survive. Previously, climate forecasts predicted that Arctic summer ice would disappear entirely by around 2060. But based on what scientists are seeing now, the Arctic may be facing summers without ice within 20 years.

Q11：What may occur in 20 years according to scientists' recent observations?

短文最后提到，此前，气候预报预测，到 2060年前后，北极夏天就没有冰了，但根据现在北极的温度情况，这一现象很有可能会在20年内出现。也就是说，20年内北极将会出现没有冰的夏天，答案为B。