1. Inventors are skilled at spotting ways to improve a situation or process. A. Inventors are keen on spotting ways to improve a situation or process. B. Inventors are practical in spotting ways to improve a situation or process. C. Inventors are well-known for spotting ways to improve a situation or process. D. Inventors are professionally trained to spot ways to improve a situation or process. 2. Scientists and inventors have made significant contributions to the lives of the common people. A. Significant contributions have been made by scientists and inventors to the live of the common people. B. Scientists and inventors had contributed significantly to the lives of the common people. C. The lives of the common people have been significantly constructed by scientists and inventors. D. The contributions which scientists and inventors made to the lives of the common people was significant. 3. Shockley's book describes the research leading to the invention of the transistor. A. Shockley's book is a means of describing the invention of the transistor. B. It is the invention of the transistor that is described in Shockley's book. C. The research leading to the invention of the transistor is described in Shockley's book. D. A description of the research leading to the invention of the transistor makes Shockley's book. 4. The more often ideas come together, the more frequently invention occurs. A. Whenever more ideas come together, it comes to the occurrence of inventions. B. The number of inventions that occur increases when a number of ideas come together. C. It is only when more ideas come together that inventions occur more frequently. D. The frequency of invention occurrence is decided by how often ideas come together. 5. Watt spent much time and money in making experiments, but nothing he tried succeeded. A. Although Watt spent much time and money in making experiments, nothing he tried succeeded. B. Despite his failure after trial and trial, Watt spent much time and money in making experiments. C. As Watt spent too much time and money in making experiments, nothing he tried succeeded. D. If Watt hadn't spent much time and money in making experiments, anything he tried would have succeeded. 6. The carbon dioxide gas given ____by the fermenting vat was known as "fixed air". A. off B. away C.out D. up 7. In 1772, Priestley published____description of how to make carbonated water, using sulphuric acid and chalk. A. a B. its C. a D. each 8. Priestly found he could dissolve the gas in the water and that it____a refreshing drink-of a kind that met the approval of his clean-living, religious-minded friends. A. makes B. made C. has made D. was made 9. ____was Giovanni Luppis, an officer in the army of the Austrian empire, who first came up with the idea of a self-propelled anti-ship weapon. A. That B.There C. It D. He 10. The bicycle as we know it today was originally developed as the "safety bicycle" because other bikes____were extremely dangerous. A. at the time B. at a time C. for a time D. for the time.