题目内容
Nobody knows______how many people are to be blame for the coal-mine accident, so the government is trying to find out the whole truth about the accident.
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With the combination of intelligence and______skills, people have found ways to use plant and animal resources, mineral ores, fuels, and many other of Earth’s materials and resources.
The Japanese personnel manager had to______keeping a chemist on the payroll even though the company no longer needed his expertise.
Central cities always have been hospitable to entrepreneurs, because they provide easy______ to buyers and producers.
I got a little______when I learned that the appointment with the general manager was changed to another time.
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