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The Arctic ice is melting at a dangerous speed and may completely disappear by the end of this century. This is from the scientists at America’s National Snow and Ice Data Centre (NSIDC美国国家冰雪数据中心). Scientists said newly satellite pictures showed the amount of sea ice was the lowest it has ever been. An area five times larger than the UK has disappeared since 1978 and the melting is getting faster. This year was the warmest Arctic summer in 400 years. Dr. Mark Serreze from the NSIDC said the worrying situation of melting ice is because of global warming.

The NSIDC’s leader Dr. Ted Scambos said the Arctic Circle(北极圈) is melting so quickly that it may never recover. He said the Arctic is in a dangerous situation that man can do nothing. Less sea ice means the Earth cannot reflect the sunlight and cool itself. Warmer seas then melt more ice. The loss of sea ice in one year increases the loss in the next year. The ice loss is said to be at eight percent every ten years. This means there may be no ice at all during the Arctic summer of 2060.

1.The Arctic ice may disappear in about _______ years.

A 30

B 50

C 80

D 100

解析：选C。数字计算题。根据第一段第一句The Arctic ice is melting at a dangerous speed and may completely disappear by the end of this century.可知，故选C。

2.The area that has disappeared since 1978 is _______ times larger than the UK.

A four

B five

C six

D ten

解析：选B。细节理解题。根据第一段第四句An area five times larger than the UK has disappeared since 1978 and the melting is getting faster.可知，故选B。

3.What caused the melting ice according to Dr. Mark Serreze?

A Global warming.

B Eating too much.

C Wars in the world.

D Too much animals in the sea.

解析：选A。细节理解题。根据第一段最后一句Dr. Mark Serreze from the NSIDC said the worrying situation of melting ice is because of global warming.可知，故选A。

4.The less sea ice is, the _______ sea water becomes.

A colder

B cooler

C worse

D warmer

解析：选D。推理判断题。根据第二段第三、四句Less sea ice means the Earth cannot reflect the sunlight and cool itself. Warmer seas then melt more ice.可知，故选D。

5.What’s the best title for the passage?

A Ice in Arctic.

B Animals in Arctic.

C How Arctic ice protects us.

D No more Arctic ice in the future.

解析：选D。文章标题题。文章围绕“北极冰层正在加快消融”展开叙述，故选D。