I have ______ all the papers but I still can’t find my notes.
I regret ______ you that you will miss your flight if you don’t hurry up. You have only twenty minutes to go.
. ______ hard. You are sure to succeed!
There was a time _____ hunger was a disturbing problem in this area.
His _____ expression suggests that the news he read just now must be _____.
It is _____ that Professor Smith will give us a lecture tomorrow.