1995年10月托福阅读全真试题

　　30. The word "they" in line 30 refers to

　　（A） pregnant females and young

　　（B） quarry operations

　　（C） the value of the fossils

　　（D） these factors

　　31.The phrase "account for" in line 33 is closest in meaning to

　　（A） record

　　（B） describe

　　（C） equal

　　（D） explain

　　32.Which of the following best expresses the relationship between the first and second paragraphs？

　　（A） The first paragraph describes a place while the second paragraph describes a field of study.

　　（B） The first paragraph defines the terms that are used in the second paragraph.

　　（C） The second paragraph describes a specific instance of the general topic discussed in the first paragraph.

　　（D） The second paragraph presents information that contrasts with the information given in the first paragraph.

　　33.Where in the passage does the author mentions the variety of fossils found at Holzmaden？

　　（A） Line 1

　　（B） Lines 3-5

　　（C） Lines 12-13

　　（D） Lines 19-21

　　Questions 34-41

　　The Lewis and Clark expedition， sponsored by President Jefferson， was the most important official examination of the high plains and the Northwest before the War of 1812. The President's secretary， Captain Meriwether Lewis， had been instructed to "explore the Missouri River， and such principal streams of it as， by its course and communication with the waters of the Pacific Ocean …may offer her most direct and practicable water communication across the continent， for the purposes of commerce." Captain William Clark， the younger brother of famed George Rogers Clerk， was invited to share the command of the exploring party.

　　Amid rumors that there were prehistoric mammoths wandering around the unknown region and that somewhere in its wilds was a mountain of rock salt 80 by 45 miles in extent，the two captains set out. The date was May 14， 1804. Their point of departure was the mouth of the Wood River， just across the Mississippi from the entrance of the Missouri River. After toiling up the Missouri all summer， the group wintered near the Mandan villages in the center of what is now North Dakota. Resuming their journey in the spring of 1805， the men worked their way along the Missouri to its source and then crossed the mountains of western Montana and Idaho. Picking up a tributary of the Columbia River， they continued westward until they reached the Pacific Ocean， where they stayed until the following spring.

　　Lewis and Clark brought back much new information，including the knowledge that the continent was wider than originally supposed. More specifically， they learned a good deal about river drainages and mountain barriers. They ended speculation that an easy coast-to-coast route existed via the Missouri-Columbia River systems， and their reports of the climate， the animals and birds， the trees and plants， and the Indians of the West - though not immediately published - were made available to scientists.

　　34.With what topic is the passage primarily concerned？

　　（A） The river systems of portions of North America.

　　（B） Certain geological features to the North American continent.

　　（C） An exploratory trip sponsored by the United States government.

　　（D） The discovery of natural resources in the United States.

　　35.According to the passage， the primary purpose of finding a water route across the continent was to

　　（A） gain easy access to the gold and other riches of the Northwest

　　（B） become acquainted with the inhabitants of the West.

　　（C） investigate the possibility of improved farmland in the West.

　　（D） facilitate the movement of commerce across the continent