2. 外语
  3. A land free from destruction, plus wealth, natural resources, and labor supply—all these were important【C1】______in helping Engl

A land free from destruction, plus wealth, natural resources, and labor supply—all these were important【C1】______in helping Engl

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问题     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.【C2】______they were not enough. Something【C3】______was needed to start the industrial process. That "something special" was men—【C4】______individual who could invent machines, find new【C5】______of power, and establish business organizations to reshape society. The men who【C6】______the machines of the Industrial Revolution【C7】______from many backgrounds and many occupations. Many of them were【C8】______inventors than scientists. A man who is a【C9】______scientist is primarily interested in doing his research【C10】______. He is not necessarily working【C11】______that his findings can be used.
    An inventor or one interested in applied science is【C12】______trying to make something that has a concrete【C13】______. He may try to solve a problem by using the theories【C14】______science or by experimenting through trial and error. Regardless of his method, he is working to obtain a【C15】______result: the construction of a harvesting machine, the burning of a light bulb, or one of【C16】______other objectives.
    Most of the people who【C17】______the machines of the Industrial Revolution were inventors, not trained scientists. A few were both scientists and inventors. Even those who had【C18】______or no training in science might not have made their inventions【C19】______a ground-work had not been laid by scientists years【C20】______.
【C20】
选项 A、ago
B、past
C、ahead
D、before
答案D
解析 根据句子意思可排除选项B和C，而条件从句中用的是完成时，因此只能用before，而不能用ago。
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大学英语四级

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