摘要： The underlined pronoun “it in Para. 2 refers to . A. the main concern of successful people B. the job that successful people do C. the commitment with which successful people do their job D. the business that successful people do with other people B Greenland is the largest in the world. It covers over 2,000,000square kilometers. Most of it lies inside the Arctic Circle, and a huge sheet of ice covers 85%of it. Imagine that a map of Greenland is on top of Europe. Greenland stretchesfrom London to the middle of the Sahara Desert. The ice sheet is more than 1.6 kilometers thick, and it never melts. Along the sea coast, mountains rise from the sea. There are a few low trees in the southwest, but no forests. Snow covers everything in winter, but in summer very low plants cover the ground between the sea and the ice sheet. Norwegians were the first Europeans to see the island in 875 A.D., but no one visited it until 982. Three years later a few Norwegians went to live there. In 1261, the people in Greenland decided to join Norway. Norway and Denmark united in 1380. This union ended in 1814, and Greenland stayed with Denmark. Greenland is fifty times larger than Denmark, but it is still a part of this small country.

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