The project is so designed that once _______ nothing can be done to change it.
Many newly found old things _______ in the museum this month.
Upon _______ , she laughed and jumped, and then ran out of the room.
I have a lot of readings _______ before the end of this term.(2010 .山东)
I still remember _______ to the temple and what I saw there.
The bike requires _______ . She requires the work in ten minutes.