It was not until she got home ______ Jennifer realized she had lost her keys.
_______ we are doing has never been done before.
_______ she couldn’t understand was ______ fewer and fewer students showed interest in her lessons.
It is pretty well understood _______ controls the flow of carbon dioxide in and out the atmosphere today.
“What were you trying to prove to the police?” “___ I was last night.”
. Patience is a kind of quality — and that is ___A___ it takes to do anything well.