题目

The most important thing about cotton in history is ______part that it played in ______ Industrial Revolution. 　 A. 不填；不填 B. the; 不填　　C. the; the D. a; the 答案：C 解析: part是先行词被定语从句修饰，是特指；后一空是由普通名词构成的专有名词,特指18世纪后半叶英国工业革命，故两空都选定冠词。

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