The most important thing about cotton in history is ______part that it played in _______Industrial Revolution.
On _______ side of the river there are a lot of trees.
At last she made herself ______ by drawing a picture.
I was about to go shopping _______ the telephone rang.
The apartment caught fire last night. Fortunately, most of the people there _______ escape.
This is _______ I have come to Yuanyang.