Question 20 is based on the passage you have just heard

听力原文：

    Have you ever heard of the Vikings? They were sea travelers from Norway. (21) More than a thousand years ago, they made three important geographical discoveries.

    (19) The Vikings’ first major discovery occurred in the ninth century. A man called Naddod was on his way from Norway to the Faroe Island, north of England, when his ship was caught in a storm. The storm blew the ship west for several days. When the weather cleared, Naddod found himself on the coast of a new land. (19) Later, Viking travelers named it Iceland.

    In 982, a Viking called Eric the Red sailed west in search of new land. (20) Five hundred miles west of Iceland, he and his men reached an icy rocky mass of land. They sailed around it until they reached the western side. Here, they found some green areas, so they named the island Greenland.

    Then, in 1001, the Vikings made their most important discovery. The son of Eric the Red, named Leif Ericson, had heard rumors about land west of Greenland. He sailed west and soon found it. He and his men landed in three places. They called the first one Helluland, which means land of flat stones. The Vikings then sailed south and made their second landing. They named this place Markland. Their third landing was at a place they called Vineland. Leif Ericson and his men were the first Europeans to walk on the shores of North America, almost 500 years earlier than Columbus.

20. What does the passage say about Greenland?

解析：D。本题为细节题。问题为：关于Greenland，文章讲了些什么？根据原文“Five hundred miles west of Iceland, he and his men reached an icy rocky mass of land”，可见在Iceland西面500英里，他和他的船员们到达一片冰雪和岩石遍布土地（an icy rocky mass of land），选项D) It was a rocky mass of land covered with ice.是对icy rocky mass of land的同义转述，为正确答案。