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It is not known with any certainty when man first learned how to make use of fire, but when he did, his life was changed in many
It is not known with any certainty when man first learned how to make use of fire, but when he did, his life was changed in many
admin
2009-01-15
53
问题
It is not known with any certainty when man first learned how to make use of fire, but when he did, his life was changed in many ways. With fire he found he had a means of keeping warm in cold weather, of boiling water, cooking meals and keeping dangerous animals away. Later he found that fire could be used to extract certain metals from ores. Then he made metals become tools, weapons and decorations.
Still later, it was discovered that two metals together could form a new but strong metal. Thus the science of preparing metal for use began, although it happened more by chance than by any planned purpose on the part of those who were concerned about it.
选项
A、When he did.
B、It is not known.
C、When he learned how to make use of fire.
D、With fire.
答案
C
解析
[C]When he learned how to make use of fire,与文章中"…when he did(learned how to make use of fire),his life was changed in many ways."说法一致,因此[C]为正确选项。
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公共英语二级笔试
公共英语(PETS)
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