Joan has been missing for a couple of days and there is growing _____for her safety.

The audience waited in________silence while their aged speaker searched among his notes for the figures he could not remember.

When you are in trouble, you may _______ your teacher and classmates for help.

What a wonderful ___________ it is! You look lovely. —Thanks. I took it in Paris last year.

He is a man of great knowledge, ___much can be learned