题目内容
Industrialists and engineers are busy taking advantage of the mineral deposits ______, regardless of the fact that this ruthless exploitation is deleterious(有害的).
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Mr. Karl made his______in the business world entirely on his own.
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Professor Lees most important _____ was the introduction of the seminary method of instruction for advanced students.
The lawyers tried to make______that Peter had not been present at the accident.
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