When he was opening the door, he was ___________ that he was being followed by a policeman.

I’ve decided to move to the countryside, for I’ve had _____ of the noises here.

—What do you think of this matter?  —This is a matter of __________ importance. I think.

Of the two readable books, which do you think is ______ one for me to read?

How cold it is! We’ve never had ______ this winter．