【正文】 (D) Amplifying devices are essential in large rooms. 39.(A) Speak very loudly. (B) Ask questions frequently. (C) Vary tone, volume, and speed of speech. (D) Limit the speech to fifteen minutes. 40.(A) Always use a microphone. (B) Avoid large rooms. (C) Never vary the volume. (D) Not to shout. 41.(A) By pausing. (B) By raising pitch. (C) By lowering register. (D) By pointing to a chart. 42.(A) To practice speaking slowly. (B) To record a voice from the television. 5 (C) To play a speech by the professor. (D) To evaluate their own voices. 43.(A) Overland transportation in the nieenth century. (B) Historical aspects of mail delivery. (C) Vehicles currently in use by the postal service. (D) The invention of the railroad. 44.(A) Boats used on rivers were extremely crowded. (B) The current was too swift for boats to cross easily. (C) Bridges were too weak to carry the weight of a stagecoach. (D) Ferry service was infrequent. 45.(A) The era during which the railroad was the dominant mode of transportation. (B) The time during which mail was delivered by horse. (C) The point at which airmail began to constitute the bulk of United States mail. (D) The time period covered in the museum exhibit. 46.(A) Models of the first airplanes used for mail delivery. (B) Replicas of railway mail cars. (C) Historical stamps. (D) Engravings of nieenthcentury railroad scenes. 47.(A) They spend most of their time looking through telescopes. (B) They are constantly analyzing data. (C) They often live near observatories. (D) They devote a lot of time to theoretical problems. 48.(A) The cost of equipment needed is reduced. (B) Fewer data need to be analyzed. (C) The images can be studied by different astronomers. (D) The natural colors of astronomical objects can be captured. 49.(A) To decrease the time it takes to photograph objects. (B) To avoid using a telescope. (C) To sharpen the color of what they observe. (D) To obtain images of distant objects. 50.(A) To spend less time at their telescopes. (B) To overe the problem of weak light. (C) To take more photographs. (D) To photograph astronomical objects without using a telescope. Section Two: Structure and Written Expression acting of Mary Ann Duff was characterized by subdued dramatic force, fidelity to____,and a marked unity of effect. (A) of each play the structure (B) the structure of each play (C) the play each structure of (D) each play the structure of coherent light of a laser____ entirely of synchronized waves of a single frequency that travel in the same direction. 6 (A) it poses (B) to pose it (C) is posed (D) is posing it that ornithischians, planteating dinosaurs, lived about 225 million years ago. (A) Scientists believe (B) Scientists believing (C) Scientists believe in (D) Scientists’ belief that look American art out of the romanticism of the mid1800’s and carried it to the most powerful heights of realism. (A) Winslow Homer’s paintings (B) It was Winslow Homer’s paintings (C) When Winslow Homer’s paintings (D) Paintings of Winslow Homer of the western United States had a sense of equality in the face of hardship,____ democratic political practices. (A) led to (B) they had led (C) which led to (D) was leading them to National Medal of Science is the____ given by the United States government. (A) highest science award (B) highest award for scientific (C) ward that is the highest scientific (D) highest, and awarding scientists. people made paints by grinding colored materials____ into powder and adding water. (A) if vegetation and clay (B) that vegetation and clay are (C) how vegetation and clay (D) such as vegetation and clay concept of television,____ images over distances, had intrigued scientists even before the invention of moving pictures or radio. (A) the transmission of (B) transmits to (C) for transmission (D) the transmitting technology gives puters____ , making them multimedia machines with interactive potential. (A) both audio and video capability (B) its capability is both audio and video (C) both audio and video are capable (D) capable of both audio and video 7 at a music store was one of Lil Armstrong’s first professional jobs as a young pianist when she came to Chicago in 1917. (A) Demonstration tunes (B) Demonstrating tunes (C) Demonstrate tunes (D) Tunes that demonstrated first people to live in____ Hawaii were the Polynesians, who sailed there in large canoes from other Pacific Islands about 2,000 years ago. (A) now where is (B) what is now (C) it is now (D) now this is Alaskan blackish exhibits____ to both extreme cold and low concentrations of oxygen under the ice. (A) remarkable, and resistance (B) remarkable, resistant (C) remarkably resistant (D) remarkable resistance acts both____. (A) killing bacteria and their growth being inhibited (B) and to kill bacteria and to inhibit their growth (C) by killing bacteria and by inhibiting their growth (D) kills bacteria and inhibits their growth until the 1850’s____ in New York seek to rescue historic buildings from destruction or alteration. (A) some concerned citizens (B) did some concerned citizens (C) some citizens concerned (D) when some concerned citizens did a diamond is heated without oxygen, it will turn to graphite, a form of____ that it is used as a lubricant. (A) carbon is so soft (B) is carbon so soft (C) carbon so soft (D) so soft the carbon 16. Gold or silver bullion serve into merce as mediums of exchange all over the world. A B C D 17. Today’s farmers have increased milk production greatly through improved methods of breeding,