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

The most important thing about cotton in history is ___part that it played in ____Industrial Revolution.

 A. /,/     B. the,/     C. the , the    D. a ,the

The most important thing about cotton in history is _____ part that it played in ____ Industrial Revolution.

   A．/; /             B．the; /       C．the; the     D．a; the

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

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