The production of television commercials must be professional ________ they aim at promoting good service, or public education

Taking ______ exercise and eating ______ food can makeyou keep thin.

I was just going to move away the heavy case but someone _______ it．Was it you?[ ]

The charity show is really wonderful.—Yes. I think it’s ________ great success.

More attention must be paid _________ the endangered animals..