Before ______of synthetic dye, yarns were often colored by dyes obtained from natural vegetable and mineral matter.

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问题 Before ______of synthetic dye, yarns were often colored by dyes obtained from natural vegetable and mineral matter.

选项 A、introducing
B、introduction
C、the introduction
D、introducing that

答案C

解析 本题考查抽象名词与冠词的用法。根据空后的of判断,空格处应填名词,排除[A]项和[D]项。抽象名词前一般不加冠词,但是,当一个抽象名词不是用于一般概念,而是表示特定的内容,特别是当它有一限制性定语修饰时,常常需要加定冠词,故答案为[C]项。
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