---–I was riding along the street and all of a sudden, a car cut in and knocked me down.. -----You can never be ________ careful in the street.
There is no question of _____ able to finish it himself.
Excuse me, but it is time to have your temperature ______.
The girl couldn't_____ how red his face was.
Your mother and I are looking forward________ you.
I'd ______ the operation unless it is absolutely necessary.