The men who 6 the machines of the Industrial Revolution 7 from many backgrounds and many occupations. Many of them were 8 inventors than scientists. A man who is a 9 scientist is primarily interested in doing his research 10. He is not necessarily working 11 that his findings can be used.
An inventor or one interested in applied science is 12 trying to make something that has an actual 13. He may try to solve a problem by using the theories 14 science or by experimenting through correct and error. Regardless of his method， he is working to obtain a 15 result： the construction of a harvesting machine， the burning of a light bulb， or one of 16 other objectives.
Most of the people who 17 the machines of the Industrial Revolution were inventors， not trained scientists. A few were both scientists and inventors. Even those who had 18 or no training in science might not have made their inventions 19 a ground work had not been laid by scientists years20.
1.A. cases B. reasons C. factors D. situations
2.A. But B. And C. Besides D. Even
3.A. else B. near C. extra D. similar
4.A. generating B. effective C. motivating （动机） D. creative
5.A. origins B. sources C. bases D. discoveries
6.A. employed B. created C. operated D. controlled
7.A. came B. arrived C. stemmed D. appeared
8.A. less B. better C. more D. worse
9.A. true B. practical C. pure D. clever
10.A. happily B. occasionally C. unwillingly D. accurately
11.A. now B. and C. all D. so
12.A. seldom B. sometimes C. usually D. never
13.A. plan B. use C. idea D. means
14.A. of B. with C. to D. as
15.A. single B. only C. specialized D. specific
16.A. few B. those C. many D. all
17.A. proposed B. developed C. supplied D. offered
18.A. little B. much C. some D. any
19.A. as B. if C. because D. while
20.A. ago B. past C. ahead D. before
KEY： 1. C 2. A 3. A 4. D 5. B 6. B 7. A 8. C 9. C 10. D 11. D 12. C 13. B 14. A 15. D 16. C 17. B 18. A 19. B 20. D
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