Unit 20 Lessons 1 & 2

第二部分：英语知识运用（共两节，满分45分）

第一节：语法填空（共10小题；每小题1.5分，满分15分）

　　阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。

There is no official agreement about who discovered Antarctica. Since ancient times, thinkers including the Greek astronomer Ptolemy believed in the 21. ________ (exist) of a huge continent on the South Pole. They gave 22. ________ name to this mysterious continent: Terra Australis Incognita, or the "Unknown Southern Land".

　　The English explorer James Cook came looking for this undiscovered continent 23. ________ the 1770s. But he was looking for a much larger continent. On his third trip, he and 24. ________ team circled Antarctica. His boat crossed the Antarctic Circle in three places, but he still failed 25. ________ (sight) the land. At the time, this was the 26. ________ (far) south anyone had ever traveled.

　　Looking at a modern-day map of Antarctica gives clues (线索) about its first explorers. In 1839 the American naval officer Charles Wilkes led a team 27. ________ the continent. He mapped over 2,000 kilometers of the continent's coastline. His efforts helped prove 28. ________ Antarctica was in fact a continent. The Wilkes Land area 29. ________ (name) after him.

In 1841, the British navy officer James Ross discovered areas now 30. ________ (call) the Ross Sea and Ross Ice Shelf. Other famous twentieth century explorers of Antarctica included Ernest Shackleton, Roald Amundsen, and Richard Evelyn Byrd.

第二节：完形填空（共20小题；每小题1.5分，满分30分）