A. if B. sources C. created D. pure E. stem F. factors G. theories H. specific I. while J. reluctantly K. accurately L.

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问题 A. if B. sources C. created D. pure E. stem
F. factors G. theories H. specific I. while J. reluctantly
K. accurately L. creative M. objectives N. operated O. specialized
A land free from destruction, plus wealth, natural resources, and labor supply—all these were important【C1】______ in helping England to become the center for the Industrial Revolution. But they were not enough. Something else was needed to start the industrial process. That "something special" was men—【C2】______ individuals who could invent machines, find new【C3】______ of power, and establish business organizations to reshape society.
The men who【C4】______ the machines of the Industrial Revolution came from many back grounds and many occupations. Many of them were more inventors than scientists. A man who is a【C5】______ scientist is primarily interested in doing his research【C6】______. He is not necessarily working so that his findings can be used.
An inventor or one interested in applied science is usually trying to make something that has a concrete use. He may try to solve a problem by using the【C7】______ of science or by experimenting through trial and error. Regardless of his method, he is working to obtain a【C8】______ result: the construction of a harvesting machine, the burning of a light bulb, or one of many other【C9】______.
Most of the people who developed the machines of the Industrial Revolution were inventors, not trained scientists. A few were both scientists and inventors. Even those who had little or no training in science might not have made their inventions【C10】______ a groundwork had not been laid by scientists years before.
【C10】

选项

答案A

解析空格前后都为完整的句子，故空格填入连词。由前后两个句子中的谓语部分might not have made和had not been laid可揣测这是对过去的虚拟，表示与过去的事实相反的假设，词库中的if“如果”可引导虚拟语气，符合逻辑要求。

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专业英语四级

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