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】______individuals 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 groundwork had not been laid by scientists years【C20】______.

【C1】

A．cases

B．reasons

C．factors

D．situations