—Oh, it’s you. I didn’t ______ you just now!—That’s because I have just had my hair cut and I’m wearing new glasses.
_______ 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.