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A pilot cannot fly a plane by sight alone. In many conditions, such as flying at night and landing in dense fog, a pilot must use radar, an alternative way of navigating. Since human eyes are not very good at determining speeds of approaching objects, radar can show a pilot 5 how fast nearby planes are moving.
The basic principle of radar is exemplified by what happens when one shouts in a cave. The echo of the sounds against the walls helps a person determine the size of the cave. With radar, however, the 10 waves are radio waves instead of sound waves. Radio waves travel at the speed of light, about 300,000 kilometers in one second. A radar set sends out a short burst of radiation waves. Then it receives the echoes produced when the waves bounce off objects. By determining the time it takes for the echoes to return to the radar set, a trained 15 technician can determine the distance between the radar set and other objects. The word "radar," in fact, gets its name from the term "radio detection and ranging." "Ranging" is the term for detection of the distance between an object and the radar set. Besides being of critical importance to pilots, radar is essential for air traffic control, 20 tracking ships at sea, and for tracking weather systems and storms.
1. What is the main topic of this passage?
(A) the nature of radar
(B) types of ranging
(C) alternatives to radar
(D) history of radar
2. In line 2, the word "dense" could be replaced by
(A) cold
(B) wet
(C) dark
(D) thick
3. According to the passage, what can radar detect besides location of objects?
(A) size
(B) weight
(C) speed
(D) shape
4. The word "shouts" in line 8 is most similar in meaning to which of the following?
(A) eavesdrops
(B) yells
(C) confesses
(D) whispers
5. Which of the following words best describes the tone of this passage?
(A) argumentative
(B) imaginative
(C) explanatory
(D) humorous
6. The phrase "a burst" in line 13 is closest in meaning in which of the following?
(A) an attachment
(B) a discharge
(C) a stream
(D) a ray
7. The word "it" in line 13 refers to which of the following?
(A) a radar set
(B) a short burst
(C) a radiation wave
(D) light
8. Which of the following could best replace the word "bounce" in line 13?
(A) overturn
(B) groove
(C) extend
(D) rebound
9. Which type of waves does radar use?
(A) sound
(B) heat
(C) radio
(D) light
10. The word "tracking" in line 20 is closest in meaning to which of the following?
(A) repairing
(B) searching for
(C) glancing at
(D) fighting
11. Which of the following would most likely be the topic of the next paragraph?
(A) other uses of radar
(B) uses of sonar technology
(C) other technology used by pilots
(D) a history of flying
12. What might be inferred about radar?
(A) It takes the place of a radio.
(B) It gave birth to the invention of the airplane.
(C) It developed from a study of sound waves.
(D) It has improved navigational safety.
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A balanced diet contains proteins, which are composed of complex amino acids. There are 20 types of amino acids, comprising about 16 percent of the body weight in a lean individual. A body needs all 20 to be healthy. Amino acids can be divided into two groups: essential 5 and nonessential. There are 9 essential amino acids. These are the proteins that the body cannot produce by itself, so a healthy individual must ingest them. The 11 nonessential amino acids, on the other hand, are produced by the body, so it is not necessary to ingest them. Proteins are described as being either high-quality or low-quality, 10 depending on how many of the 9 essential amino acids the food contains. High-quality proteins, typically found in animal meats, are proteins that have ample amounts of the essential amino acids. Low-quality proteins are mainly plant proteins and usually lack one or more of the essential amino acids. Since people who follow a strict vegetarian 15 diet are ingesting only low-quality proteins, they must make sure that their diets contain a variety of proteins, in order to ensure that what is lacking in one food is available in another. This process of selecting a variety of the essential proteins is called protein complementation. Since an insufficient amount of protein in the 20 diet can be crippling, and prolonged absence of proteins can cause death, it is imperative that a vegetarian diet contains an ample amount of the essential proteins.1. With what topic is this passage primarily concerned?
(A) the 20 types of amino acids
(B) high- and low-quality proteins
(C) the process of complementation
(D) healthy diets for vegetarians
2. The word "lean" in line 3 could be best replaced by
(A) thin
(B) fat
(C) tall
(D) short
3. The word "ingest" in line 7 is closest in meaning to which of the following?
(A) chew
(B) swallow
(C) suck
(D) drink
4. The word "ample" in line 13 is closest in meaning to which of the following?
(A) meager
(B) frequent
(C) substantial
(D) harmful
5. Which of the following would NOT be an example of a low-quality protein?
(A) legumes
(B) apples
(C) grains
(D) tuna
6. As used in line 14, which of the following words is closest in meaning to "strict"?
(A) responsible
(B) casual
(C) harmonious
(D) rigid
7. According to the passage, a vegetarian could die from insufficient protein ingestion if he or she
(A) did not follow a varied and properly protein-complemented diet.
(B) ate too many animal proteins,and could not digest them properly.
(C) did not follow a diet in which nonessential proteins were ingested.
(D) ate too many low-quality proteins.
8. Which of the following is closest in meaning to the word "crippling" as used in line 20?
(A) discouraging
(B) betraying
(C) incapacitating
(D) amazing
9. Which of the following words could best replace the word "prolonged" in line 20?
(A) narrow
(B) hollow
(C) hard-hearted
(D) extended
10. In line 21, the word "imperative" can be best replaced by
(A) crucial
(B) impossible
(C) wonderful
(D) satisfying
11. Which of the following best describes the author's tone in this passage?
(A) forceful
(B) light
(C) casual
(D) argumentative
12. Which statement best describes the organization of this passage?
(A) Contrasting views concerning proteins are compared.
(B) The author moves from a general comment to a specific argument.
(C) A statement is given and its cause is then discussed.
(D) Items are discussed in their order of importance.
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Carnegie Hall, the famous concert hall in New York City, has again undergone a restoration. While this is not the first, it is certainly the most extensive in the building's history. As a result of this new restoration, Carnegie Hall once again has the quality of sound 5 that it had when it was first built.
1. This passage is mainly about
(A) changes to Carnegie Hall
(B) the appearance of Carnegie Hall
(C) Carnegie Hall's history during the Great Depression
(D) damage to the ceiling in Carnegie Hall
2. The word "extensive" in line 3 could be best replaced by which of the following?
(A) fabulous
(B) thorough
(C) devoted
(D) continuous
3. In line 11, what is the meaning of the word "detrimental"?
(A) dangerous
(B) significant
(C) extreme
(D) harmful
4. What major change happened to the hall in 1946?
(A) The acoustic dome was damaged.
(B) Space in the building was sold to commer-cial businesses.
(C) The walls were damaged in an earthquake.
(D) The stage was renovated.
5. Who was Andrew Carnegie?
(A) a violinist
(B) an architect
(C) a steel mill owner
(D) mayor of New York City
6. Which of the following words could best replace the word "gaping" in line 18?
(A) small
(B) round
(C) vital
(D) wide
7. The word "fake" in line 20 is most similar to which of the following?
(A) low
(B) false
(C) thin
(D) handsome
8. What was Isaac Stern's relationship to Carnegie Hall?
(A) He made the movie "Carnegie Hall" in 1946.
(B) He performed on opening night in 1891.
(C) He tried to save the hall, beginning in 1960.
(D) He opened a coffeeshop in Carnegie Hall during the Depression.
9. What was probably the most important aspect of the recent renovation?
(A) restoring the outer wall
(B) expanding the lobby
(C) restoring the plaster trim
(D) repairing the ceiling
10. Which of the following is closest in meaning to the word "unveiled" in line 24?
(A) announced
(B) restricted
(C) overshadowed
(D) located
11. The author uses the word "spurred" in line 26 to show that Stern
(A) predicted the result
(B) probed the plans
(C) was told in advance
(D) was stimulated to act
12. How does the author seem to feel about the future of Carnegie Hall?
(A) ambiguous
(B) guarded
(C) optimistic
(D) negative
13. Which of the following would most likely be the topic of the next paragraph?
(A) a scientific explanation of acoustics and the nature of sound
(B) a description of people's reactions to the newly renovated hall
(C) a discussion of the coffee shop that once was located in the building
(D) further discussion about the activities of Isaac Stern in 1960
HUE IMPERIAL CITY
Construction of the Imperial City started (1)______1805, under the reign of Emperor Gia Long, and (2)______completed in 1832, under the reign of Emperor Minh Mang. Built (3)______the northern bank of (4)______Perfume River, the Imperial City was influenced by the style of French architect Vauban. The city (5)______three sections: the Royal Citadel, the Imperial Enclosure and the Forbidden Purple City.
1. A. on B. in C. at D. for 2. A. is B. were C. are D. was 3. A. on B. in C. at D. above 4. A. a B. the C. an D. Ø 5. A. comprised B. comprising C. will comprise D. comprisesPeople find the water dirty ________ there are some water waste chemicals in it.
a and
b but
c as
mn giúp e vs
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Langston Hughes was one of the greatest American writers of the twentieth century. He was born in Joplin, Missouri, and moved to Cleveland at the age of fourteen. Several years later he spent one year in Mexico before attending Columbia University in New York. For a few 5 years after that he roamed the world as a seaman, visiting ports around the world and writing some poetry. He returned to the United States and attended Lincoln University, where he won the Witter Bynner Prize for undergraduate poetry. After graduating in 1928, he traveled to Spain and to Russia with the help of a Guggenheim fellowship.1. What is the main topic of this passage?
(A) the life of Langston Hughes
(B) the Harlem Renaissance
(C) African-American writers
(D) American twentieth-century writers
2. Where was Langston Hughes born?
(A) Spain
(B) New York
(C) Missouri
(D) North Carolina
3. The word "roamed" as used in line 5 is closest in meaning to which of the following?
(A) traveled
(B) soared
(C) floated
(D) walked
4. As used in line 5, which of the following words could best replace the word "ports"?
(A) islands
(B) ships
(C) friends
(D) harbors
5. To which of the following movements might "Shakespeare in Harlem" refer to?
(A) the Civil War
(B) the Harlem Riots
(C) the Harlem Renaissance
(D) the Civil Rights Movement
6. What provided Hughes with assistance for his travel to Spain and Russia?
(A) his job as a reporter
(B) his career as a soldier
(C) a literary fellowship
(D) a college study program
7. The word "talents" in line 16 could be be replaced by which of the following?
(A) desires
(B) abilities
(C) strategies
(D) careers
8. According to the author, what did Hughes do during the later years of his life?
(A) write short stories
(B) popularize African-American writers
(C) advocate racial equality
(D) write about life in Harlem
9. Which of the following could best replace the word "accomplished" as used in line 19?
(A) successful
(B) prolific
(C) brilliant
(D) imaginative
10. The author uses the word "flood" in line 22 to refer to
(A) a drought
(B) an outpouring
(C) a cloudburst
(D) a streak
11. Which of the following can best substitute for the word "depicting" in line 23?
(A) congratulating
(B) blessing
(C) screening
(D) portraying
12. According to the passage, Langston Hughes was all of the following EXCEPT
(A) a novelist
(B) a poet
(C) an historian
(D) a journalist
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The peregrine falcon, a predatory bird indigenous to North America, was once in danger of extinction. In the 1960s, scientists discovered byproducts of the pesticide DDT in the birds' eggs, which caused them to be too soft to survive. The use of the pesticide had been 5 banned in the United States, but the falcons were eating migratory birds from other places where DDT was still used. In order to increase the survival rate, scientists were raising the birds in laboratories and then releasing them into mountainous areas. This practice achieved only moderate success, however, because many of the birds raised 10 in captivity could not survive in the wild.
1. What is the main topic of the passage?
(A) survival of peregrine falcons
(B) releases into the wild
(C) endangered species
(D) harmful effects of pesticides
2. In line 1, the phrase "indigenous to" could be best replaced by
(A) typical of
(B) protected by
(C) adapted to
(D) native to
3. The word "byproducts" in line 3 could best be replaced by which of the following?
(A) derivatives
(B) proceeds
(C) chemicals
(D) elements
4. In line 5, the word "banned" could be best replaced by
(A) authorized
(B) developed
(C) disseminated
(D) prohibited
5. Which of the following words is closest in meaning to the word "rate," as used in line 7?
(A) speed
(B) percentage
(C) continuation
(D) behavior
6. In line 7, the word "raising" most probably means
(A) breeding
(B) elevating
(C) collecting
(D) measuring
7. Why were the peregrine falcons in danger?
(A) because of pesticides used by American farmers
(B) because they migrated to countries where their eggs could not survive
(C) because they ate birds from other countries where DDT was still used
(D) because they were prized by hunters and hunted to near extinction
8. The word "releases" as used in line 12 most probably means
(A) internment
(B) regression
(C) distribution
(D) possessions
9. The word "ledge" in line 14 is closest in meaning to
(A) window
(B) wall
(C) terrace
(D) shelf
10. According to the passage, which of the following is NOT a reason why a falcon might choose to live in a city?
(A) There are high places to nest.
(B) There are other falcons nearby.
(C) There is a lack of predators.
(D) There is abundant food.
11. According to the passage, which of the following are the falcon's main predators?
(A) pigeons
(B) rattlesnakes
(C) owls
(D) humans
12. As used in line 20, the word "spots" could best be replaced by
(A) places
(B) dilemmas
(C) jungles
(D) materials
13. According to the passage, where have the release programs been the most successful?
(A) in office buildings
(B) on the East Coast
(C) in mountainous areas
(D) in the wild