Mr. Black is very happy because the clothes made in his factory have never been __________.
It is the test system, _____ the teachers, that is to blame for the heavy burden of middle school students nowadays.
______ 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.