In the second paragraph, the author inentions sun tanning as an example of __________ .
A.humans improving their local condition
B.humans surviving in adverse condition
C.humans using the principle of use and disuse
D.humans running the risk of skin cancer

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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 30 to 37.
The Arts and Crafts Movement in the United States was responsible for sweeping changes in attitudes toward the decorative arts, then considered the minor or household arts. Its focus on decorative arts helped to induce United States museums and private collectors to begin collecting furniture, glass, ceramics, metalwork, and textiles in the late nineteenth and early twentieth centuries. The fact that artisans, who were looked on as mechanics or skilled workers in the eighteenth century, are frequently considered artists today is directly attributable to the Arts and Crafts Movement of the nineteenth century. The importance now placed on attractive and harmonious home decoration can also be traced to this period, when Victorian interior arrangements were revised to admit greater light and more freely flowing spaces.
The Arts and Crafts Movement reacts against mechanized processes that threatened handcrafts and resulted in cheapened, monotonous merchandise. Founded in the late nineteenth  century by British social critics John Ruskin and William Morris, the movement revered craft as a form of art. In a rapidly industrializing society, most Victorians agreed that art was an essential moral ingredient in the home environment, and in many middle- and working-class homes craft was the only form of art. Ruskin and his followers criticized not only the degradation of artisans reduced to machine operators, but also the impending loss of daily contact with handcrafted objects, fashioned with pride, integrity, and attention to beauty.
In the United States as well as in Great Britain, reformers extolled the virtues of handcrafted objects: simple, straightforward design; solid materials of good quality; and sound, enduring construction techniques. These criteria were interpreted in a variety of styles, ranging from rational and geometric to romantic or naturalistic. Whether abstract, stylized, or realistically treated, the consistent theme in virtually all Arts and Crafts design is nature.
The Arts and Crafts Movement was much more than a particular style; it was a philosophy of domestic life. Proponents believed that if simple design, high-quality materials, and honest construction were realized in the home and its appointments, then the occupants would enjoy moral and therapeutic effects. For both artisan and consumer, the Arts and Crafts doctrine was seen as a magical force against the undesirable effects of industrialization.
The word “extolled” in the third paragraph is closest in meaning to ________.
A.exposed                              
B.praised                                
C.believed                              
D.accepted

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. 
According to the passage, a radio telescope enables the detection of ______. 
A.normal light of celestial objects  
B.radio waves sent out by celestial objects
C.creatures that inhabit celestial objects  
D.shapes and sizes of celestial objects