The most important thing about cotton in history is ________ role it played in ________ Industrial Revolution.
A. /; / B. the; / C. the; the D. a; the
The most important thing about cotton in history is ________ role it played in ________ Industrial Revolution.
A. /; / B. the; / C. the; the D. a; the
C
句意：历史上关于棉花最重要的事情是其在工业革命方面所起的作用。Part后接定语从句，表示特指。工业革命Industrial Revolution前应加the，由普通名词构成的专有名词。