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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.

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1. In 1886 in the United States, a pharmacist named Dr. John Pemberton tried to invent a medicine because he wanted a cure for___ A. headache B. headaches C. a headache D. the headaches 2. The key___inventive success often requires being in the right place at the right time. A. for B. of C. in D. to 3. An invention developed____one purposed will sometimes find use in entirely different circumstances. A. in B. with C. by D. for 4. Charles Macintosh, an amateur chemist, was experimenting with coal-tar naphtha, a chemical waste product, and realized that it was a powerful solvent that___a solution from rubber. A. will make B. would make C. can make D. could make 5. The invention of the telephone ____the beginning of a new era in communication technology. A. mark B. marks C. marked D. marking 6. It is the classical Athenians who can probably lay claim___the invention of commercial advertising as we know it today. A. to B.for C. of D. with 7. _____with the internet, which is a system of linked computer networks, the worldwide web was invented by British computer scientist Tim Berners-lee. A. Not to confuse B. Not to be confused C. To be not confused D. Confused not to be 8. Both inventors and engineers look for ways to improve things in areas like health, food, safety, transportation, aerospace, electronics,___, and the environment. A. communication B. communicative C. communicator D. communicating 9. The European Patent Convention, which was implemented in 1977, created a European Patent Office that can issue___European patent. A. a B.an C.the D.X 10. The first American____the propelling of a boat by steam was William Henry, a gunsmith of Lancaster, Pennsylvania. A. attempt B. to attempt C. attempting D. attempted

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1. Volunteer work includes a wide range of activities. Among them are coaching children and youth. A. Coaching children and youth are the most common activities included in a wide range of volunteer working activities. B. Coaching children and youth are included in a wide range of activities of volunteer work. C. Including a wide range of activities, volunteer work involves coaching children and youth. D. Volunteer work includes a wide range of activities, among which are coaching children and youth. 2. It is recognized that students' volunteer work will benefit communities. However, its primary purpose is to contribute to students' development. A. Although it is recognized that students' volunteer work will benefit communities, its primary purpose is to contribute to students' development. B. As it is recognized that students' volunteer work will benefit communities, its primary purpose is to contribute to students' development. C. As the primary purpose of students' volunteer work is to contribute to students' development, its benefit to communities is recognized. D. To recognize the benefit of students' volunteer work to communities, it is to note that its primary purpose is to contribute to students' development. 3. Volunteering has a considerable impact on the education system itself. A. The education itself has been considerably impacted by volunteering activities. B. The impact of volunteering on the education system itself is worth considering. C. There is a considerable impact of volunteering on its education system itself. D. It is the volunteering activities that have considerable impact on education. 4. Volunteering makes a significant contribution to the economy all around the world. A. A contribution from volunteering to the economy has been significantly made. B. The economy all around the world benefits significantly from volunteering. C. Volunteers around the world have made significant contribution to the economy. D. Volunteering has significantly contributed to the world economy in all sectors. 5. Drugs are tested in patient volunteers to monitor adverse reactions to long-term use. A. Patient volunteers help test drugs to monitor their adverse reactions to long-term use. B. patient volunteers are tested by drugs to monitor adverse reactions to long-term use. C.volunteers test drugs for patients to monitor adverse reactions to long-term use. D. adverse reactions to long-term use are monitored after being tested in patient volunteers

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