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.