As is often pointed out, knowledge is a two-edged weapon which can be used _____ for good or evil.
______ is our belief that improvements in health care will lead to a stronger, more prosperous economy.
It was___he said___disappointed me.
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.