With a lot of difficult problems ____, the manager felt like a cat on hot bricks.
The plane flew smoothly ______ in the sky and people spoke ______ of theexperienced pilot.
Professor White has written some short stories, but he is _____ known for his plays.
How beautifully she sings! I have never heard _____ voice.
I thought she was famous, but none of my friends have ______heard of her.
—Are you going to have a holiday this year? —I'd love to. I can't wait to leave this place ______.