Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 51 to 60.
Paul Watson is an environmental activist. He is a man who believes that he must do something, not just talk about doing something. Paul believes in protecting endangered animals, and he protects them in controversial ways. Some people think that Watson is a hero and admire him very much. Other people think that he is a criminal.
On July 16th, 1979, Paul Watson and his crew were on his ship, which is called the Sea Shepherd . Watson and the people who work on the Sea Shepherd were hunting on the Atlantic Ocean near Portugal. However, they had a strange prey; instead of hunting for animals, their prey was a ship, the Sierra . The Sea Shepherd found the Sierra, ran into it and sank it. As a result, the Sierra never returned to the sea . The Sea Shepherd, on the other hand, returned to its home in Canada . Paul Watson and his workers thought that they had been successful.
The Sierra had been a whaling ship, which had operated illegally. The captain and the crew of the Sierra did not obey any of the international laws that restrict whaling. Instead, they killed as many whales as they could, quickly cut off the meat, and froze it. Later, they sold the whale meat in countries where it is eaten.
Paul Watson tried to persuade the international whaling commission to stop the Sierra . However, the commission did very little, and Paul became impatient. He decided to stop the Sierra and other whaling ships in any way that he could . He offered to pay $25,000 to anyone who sank any illegal whaling ship, and he sank the Sierra . He acted because he believes that the whales must be protected . Still, he acted without the approval of the government; therefore, his actions were controversial.
Paul Watson is not the only environmental activist. Other men and women are also fighting to protect the Earth. Like Watson, they do not always have the approval of their governments, and like Watson, they have become impatient. Yet, because of their concern for the environment, they will act to protect it.
The members of a ship’s crew are ____.
A.he people who own the ship
B.all of the people on a ship, including the passengers
C. the people who work on the airplanes
D. the men and women who work on the ship

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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 of the questions from 26 to 35. 
A radio telescope is a radio receiver that "sees" radio waves. Unlike a normal telescope, which sees light, a radio telescope is used primarily in the are a of astronomy because it can detect radio waves that are emitted by celestial objects. Such objects in space, also called radio objects, can be things such as hot gas, electrons, and wavelengths given off by different atoms and molecules.
The first radio telescope was invented by Grote  Reber  in 1937. He was an American who graduated with a degree in engineering. He went on to work as an amateur radio operator and later decided to try to build his own radio telescope in his backyard. Reber's  first two radio receivers failed to pick up any signals from outer space, but in 1938, his third radio telescope successfully picked up radio waves from A radio telescope consists of a large parabolic-shaped dish antenna or a combination of two or more. The significance of the parabolic shape allows for the incoming radio waves to be concentrated on one focal point, allowing the signals to be picked up as strongly as possible. A larger dish means that more signals can be received and focalized.
In the late 1950s and early 1960s, the largest radio telescope of the time was invented with a seventy-six meter telescope although larger telescopes have been made since then. The largest current radio telescope in the world is the RATAN-600 in Russia, whose diameter  is 576 meters. It has provided valuable feedback of the sun's radio wavelengths  and atmosphere. The largest radio telescope in Europe is a 100-meter diameter  telescope in Germany, and the largest radio telescope in the United States is the Big Ear in the state of Ohio. The largest array of telescopes is the Giant Metrewave Radio Telescope in India.
Radio telescopes have provided scientists with valuable information about our universe. One of the most  important functions of radio telescopes is their ability to allow scientists to track different space probes, the  unmanned space missions in outer space. Radio telescopes allow for the travel of space probes into places like the surface of Mars that are too dangerous for men to explore. With out radio wave technology, scientists would not know much of what inhabits the universe nor would they be able to see it. Radio waves are our eyes and ears in outer space. 
The verb “pick up” in paragraph 3 is closest in meaning to ______. 
A.send 
B.receive
C.select 
D.lift