2. 外语
  3. A land free from destruction, plus wealth, natural resources, and labor supply all these were important 【21】______ in helpin

A land free from destruction, plus wealth, natural resources, and labor supply all these were important 【21】______ in helpin

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问题      A land free from destruction, plus wealth, natural resources, and labor supply all these were important  【21】______    in helping England to become the center for the Industrial Revolution.  【22】______    they were not enough. Something  【23】______    was needed to start the industrial process. That "something special" was men,  【24】______    individuals who could invent machines, find new  【25】______    of power, and establish business organizations to reshape society.
     The men who  【26】______    the machines of the Industrial Revolution  【27】______    from many backgrounds and many occupations. Many of them were  【28】______    inventors than scientists. A man who is a  【29】______    scientist is primarily interested in doing his research  【30】______   . He is not necessarily working  【31】______    that his findings can be used.
     An inventor or one interested in applied science is  【32】______    trying to make something that has a concrete  【33】______   . He may try to solve a problem by using the theories  【34】______    science or by experiencing through trail and error. Regardless of his method, he is working to obtain a  【35】______    result: the construction of a harvesting machine, the burning of a tight bulb, or one of  【36】______    other objectives.
      Most of the people who  【37】______    the machines of the Industrial Revolution were inventors, not trained scientists. A few were both scientists and inventors. Even those who had  【38】______    or no training in science might not have made their inventions  【39】______    a groundwork had not been laid by scientists years  【40】______   .
【40】
选项 A、ago
B、past
C、ahead
D、before
答案D
解析 本题考查副词用法。四个选项都是可以用作时间状语的副词，但由于要求填入的副词用来修饰一个过去完成时的谓语动词，即表示过去某个时间以前发生的动作，所以应选before。
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