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【单选题】

The first ______ in the development of civilized man were probably the invention of primitive weapons and the discovery of fire.

A．intervals

B．breaks
C．stages
D．periods
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根据网考网移动考试中心的统计，该试题：

3%的考友选择了A选项

19%的考友选择了B选项

76%的考友选择了C选项

2%的考友选择了D选项

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