All of us still remember the terrible earthquake that _________ Wenchuan several years ago.
I was deeply impressed with the man’s willingness ______.
--Where did you put my dictionary after using it this morning? --I put it back ______ I took it.
The discussion came to life when someone ______ an interesting topic.
After the new technique was applied to production, the factory has produced ______ over the same period last year.
-- What does the sign on the wall read?--“ No person ______ enter it without permission.”