25. --- We could have walked to the station. It was so near.--- Yes. A taxi ____ at all necessary.
It is pretty well understood _______ controls the flow of carbon dioxide in and out the atmosphere today.
Country life gives him peace and quiet, which is ______ he can’t enjoy while living in big cities.
“What were you trying to prove to the police?” “___ I was last night.”
It has come to my notice _______ some of you have missed classes.
Patience is a kind of quality — and that is ___A___ it takes to do anything well.