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quocthien01082005
2 năm trước
With their compound eyes (A), dragonflies can see move insects (B) approximately (C) 18 feet (D) away.
A.compound eyes
B.move insects
C.approximately
D.feet
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 Read the following passage, and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer to each question.
 What geologists call the Basin and Range Province in the United States roughly coincides in its northern portions with the geographic province known as the Great Basin. (51)The Great Basin is hemmed in on the west by the Sierra Nevada and on the east Line by the Rocky Mountains; it has no outlet to  the sea.(52) The prevailing winds in the Great Basin are from the west. Warm, moist air from the Pacific Ocean is forced upward as it crosses the Sierra Nevada. At the higher altitudes it cools and the moisture it carries is precipitated as rain or snow on the western slopes of the mountains. That which reaches the Basin is air wrung dry of moisture(54). What little water falls there as rain or snow, mostly in the winter months, evaporates on the broad, flat desert floors. It is, therefore, an environment in which  organisms battle for survival. Along the rare watercourses, cottonwoods and willows  eke out a sparse  existence. In the upland ranges, pinion pines and junipers struggle to hold their own. (56)
But the Great Basin has not always been so arid. Many of its dry, closed depressions were once filled with water. Owens Valley, Panamint Valley, and Death Valley were once a string of interconnected lakes.(57) The two largest of the ancient lakes of the Great Basin were Lake Lahontan and Lake Bonneville. The Great Salt Lake is all that remains of the latter, and Pyramid Lake is one of the  last briny remnants of the former. There seem to have been several periods within the last tens of thousands of years when water accumulated in these basins. The rise and fall of the lakes were undoubtedly linked to the advances and retreats of the great ice sheets that covered much of the northern part of the North American continent during those times. Climatic changes during the Ice Ages sometimes brought cooler, wetter weather to mid latitude deserts worldwide, including those of the Great Basin(60). The broken valleys of the Great Basin provided ready receptacles for this moisture. 
Why does the author mention Owens Valley, Panamint Valley, and Death Valley in the second paragraph? 
A.To explain their geographical formation 
B.To give examples of depressions that once contained water 
C.To compare the characteristics of the valleys with the characteristics of the lakes 
D.To explain what the Great Basin is like today

Read the passage carefully and choose the correct answer.
Martin Luther King, Jr., is well known for his work in civil rights and for his many famous speeches, among them is his moving "I Have A Dream" speech. But fewer people know much about King's childhood. M.L., as he was called, was born in 1929 in Atlanta, Georgia, at the home of his maternal grandfather. M.L.'s grandfather, the Reverend A.D. Williams, purchased their home on Auburn Avenue in 1909, twenty years before M.L. was born. The Reverend Williams, an eloquent speaker, played an important role in the community since so many people's lives centered around the church. He allowed his church and his home to be used as a meeting place for a number of organizations dedicated to the education and social advancement of blacks. M.L. grew up in this atmosphere, with his home being used as a community gathering place, and was no doubt influenced by it. 
M.L.'s childhood was not especially eventful. His father was a minister and his mother was a musician. He was the second of three children, and he attended all-black schools in a black neighborhood. The neighborhood was not poor, however. Auburn Avenue was the main artery through a prosperous neighborhood that had come to symbolize achievement for Atlanta's black people. It was an area of banks, insurance companies, builders, jewelers, tailors, doctors, lawyers, and other black-owner, black-operated businesses, and services. Even in the face of Atlanta's segregation, the district thrived. Dr. King never forgot the community spirit he had known as a child, nor did he forget the racial prejudice that was a seemingly insurmountable barrier that kept black Atlanta from mingling with whites.
The word "tailors" in paragraph 2 describes people who are associated with which of the following trades?
A.garment making  
B.shoe making  
C.book binding  
D.flower arranging

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