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Test 16
WORKER DIAMONDS Glittering gems called diamonds are among the most (1)………....of human possessions. Through the ages (2) ……….....have been a lasting evidence of wealth. Lands may lose their soil, buildings may be destroyed, stocks and bonds may become worthless, (3)……….....the value °i diamonds remains relatively unchanged. Diamonds are not of value only (4)……….....signs of wealth. In addition, the diamond is one of (5)………..... hardest, longest-wearing substances known to man. Because of (6)………....., it is very valuable for Practical use. In fact, about three-fourths of the total annual supply of diamonds (7)………..used in factories and machine shops. A diamond on the……….....(8) of a cutting tool can cut through the hardest steel but (9)……….....a diamond can cut (10)……….....diamond. Because of their unusual (11)………...., diamonds are used to sharpen grinding wheels. They are placed on the tips of the grinding drills used to cut through tons of bed rocks. In scores of………(12) ways, diamonds are essential to turning the wheels……….....(13) modern machines. About 4% tons of diamonds are mined annually. The vast diamond (14)………........of South Africa produce most of these diamonds, but in recent years many diamonds (15)……….....also come from Brazil.
Test 17
BARK MEDICINE According to an old (1)………..., in the early seventeenth century a Peruvian Indian was cured of a terrible fever (2) ………...eating the bark of the cinchona tree. Quinine, the drug (3)………... can be extracted from cinchona bark, was (4)………...widely used as medicine until 1816. Quinine has proved invaluable to modern medicine. It is used in (5) ………. treatment of malaria, a (6)………...transmitted by the anopheles mosquito and common in the tropical (7) ………...of the world. Quinine preparations are also used to help cure typhoid fever, rheumatic fever, and (8) ………...sicknesses. The cinchona tree belongs to the evergreen family and, unlike most evergreens, (9)………...very fragrant flowers. Cinchonas are native to South America, but are now (10)………...in such other places as India, Ceylon, and Java. (11)………...cinchona trees do not reach full size for about eight years, the bark can be taken (12) ………...three-year-old trees. First the young trees are cut down. (13)………...the bark is carefully stripped off, dried, and packed. It is sent to a factory (14)………...it is ground into a brown powder. (15)………...this powder, the quinine is extracted.
Test 18
GROWING LANGUAGE Linguists believe that early men used many gestures to communicate ………(1) one another. This, it is thought, was man's first form of……….(2) and the only one he had………...(3) a long period of time. Even today we use some sign language: for example, we shake our ………...(4) to indicate yes or no, we point and we wave. The first spoken words may have been early man's attempt to……….(5) the sounds made by animals. Then he may have developed sounds of his……….(6). Gradually, man may have repeated certain sounds so ……….(7) that they became familiar and understandable to others. Once spoken language had begun, perhaps man invented new………...(8) as he needed them to express himself verbally ………... (9) to name new objects. In this way we can imagine language growing. ………...(10) using words, parents were able to teach them to their children. The children in turn probably made up new………...(11). Each generation, therefore, in the development of language, knew more words than the generation………...(12) it. Language is still growing and changing. Can you think……….(13) some words that you use today………(14) were not used by your parents or grandparents………...(15) they were children ?
Test 19
Last autumn I………...(1) a week at a big hotel in London. It was one of those modern hotels where.............(2) room is the same size and .............(3) the same furniture, and looks just………...(4) every other room. My room was 311 on the third………...(5) . One night, quite late, I got back to the hotel………...(6) a very good dinner with some friends. I walked into the lift and ………(7) the button. When the lift……….(8), I got out and walked to my room-or what I.............(9) was my room..............(10) I opened the door I saw an astonishing scene. A man was pointing a revolver ………...(11) a woman sitting in an armchair, and the woman was saying in a frightened ………...(12): "Please………...(13) shoot me!" I turned round, ran along the corridor and………...(14) the stairs - I daren't wait for the lift - and found the night porter in the hall. "Quick," I cried, "someone is………...(15) murdered in my room." [....]
Test 20
NATURE'S LIGHT When you see a firefly flitting through the air on a dark summer ………(1), you may wonder………...(2) the source of its light. This light………...(3) from a mineral called phosphorus, which is found in small amounts in the………...(4) of the firefly. Phosphorus is also found in the bodies of many………...(5) of deep-sea fish. Sometimes………...(6)
WORKER DIAMONDS Glittering gems called diamonds are among the most (1)………....of human possessions. Through the ages (2) ……….....have been a lasting evidence of wealth. Lands may lose their soil, buildings may be destroyed, stocks and bonds may become worthless, (3)……….....the value °i diamonds remains relatively unchanged. Diamonds are not of value only (4)……….....signs of wealth. In addition, the diamond is one of (5)………..... hardest, longest-wearing substances known to man. Because of (6)………....., it is very valuable for Practical use. In fact, about three-fourths of the total annual supply of diamonds (7)………..used in factories and machine shops. A diamond on the……….....(8) of a cutting tool can cut through the hardest steel but (9)……….....a diamond can cut (10)……….....diamond. Because of their unusual (11)………...., diamonds are used to sharpen grinding wheels. They are placed on the tips of the grinding drills used to cut through tons of bed rocks. In scores of………(12) ways, diamonds are essential to turning the wheels……….....(13) modern machines. About 4% tons of diamonds are mined annually. The vast diamond (14)………........of South Africa produce most of these diamonds, but in recent years many diamonds (15)……….....also come from Brazil.
Test 17
BARK MEDICINE According to an old (1)………..., in the early seventeenth century a Peruvian Indian was cured of a terrible fever (2) ………...eating the bark of the cinchona tree. Quinine, the drug (3)………... can be extracted from cinchona bark, was (4)………...widely used as medicine until 1816. Quinine has proved invaluable to modern medicine. It is used in (5) ………. treatment of malaria, a (6)………...transmitted by the anopheles mosquito and common in the tropical (7) ………...of the world. Quinine preparations are also used to help cure typhoid fever, rheumatic fever, and (8) ………...sicknesses. The cinchona tree belongs to the evergreen family and, unlike most evergreens, (9)………...very fragrant flowers. Cinchonas are native to South America, but are now (10)………...in such other places as India, Ceylon, and Java. (11)………...cinchona trees do not reach full size for about eight years, the bark can be taken (12) ………...three-year-old trees. First the young trees are cut down. (13)………...the bark is carefully stripped off, dried, and packed. It is sent to a factory (14)………...it is ground into a brown powder. (15)………...this powder, the quinine is extracted.
Test 18
GROWING LANGUAGE Linguists believe that early men used many gestures to communicate ………(1) one another. This, it is thought, was man's first form of……….(2) and the only one he had………...(3) a long period of time. Even today we use some sign language: for example, we shake our ………...(4) to indicate yes or no, we point and we wave. The first spoken words may have been early man's attempt to……….(5) the sounds made by animals. Then he may have developed sounds of his……….(6). Gradually, man may have repeated certain sounds so ……….(7) that they became familiar and understandable to others. Once spoken language had begun, perhaps man invented new………...(8) as he needed them to express himself verbally ………... (9) to name new objects. In this way we can imagine language growing. ………...(10) using words, parents were able to teach them to their children. The children in turn probably made up new………...(11). Each generation, therefore, in the development of language, knew more words than the generation………...(12) it. Language is still growing and changing. Can you think……….(13) some words that you use today………(14) were not used by your parents or grandparents………...(15) they were children ?
Test 19
Last autumn I………...(1) a week at a big hotel in London. It was one of those modern hotels where.............(2) room is the same size and .............(3) the same furniture, and looks just………...(4) every other room. My room was 311 on the third………...(5) . One night, quite late, I got back to the hotel………...(6) a very good dinner with some friends. I walked into the lift and ………(7) the button. When the lift……….(8), I got out and walked to my room-or what I.............(9) was my room..............(10) I opened the door I saw an astonishing scene. A man was pointing a revolver ………...(11) a woman sitting in an armchair, and the woman was saying in a frightened ………...(12): "Please………...(13) shoot me!" I turned round, ran along the corridor and………...(14) the stairs - I daren't wait for the lift - and found the night porter in the hall. "Quick," I cried, "someone is………...(15) murdered in my room." [....]
Test 20
NATURE'S LIGHT When you see a firefly flitting through the air on a dark summer ………(1), you may wonder………...(2) the source of its light. This light………...(3) from a mineral called phosphorus, which is found in small amounts in the………...(4) of the firefly. Phosphorus is also found in the bodies of many………...(5) of deep-sea fish. Sometimes………...(6)
