The silence of the library _____ only by the sound of pages being turned over.
American Indians _______ about five percent of the U.S population.
Gun control is a subject _______ Americans have argued for a long time.
The moment I got home, I found I ______ my jacket on the playground.
I’d like to work with _______ is honest and easy to get on with.
I won’t tell the student the answer to the math problem until he ________ on it for more than an hour.