More than 60% of the students ____ the countryside.
—— What do you think of the concert?—— Oh, it was______success.
The plane flew smoothly ______ in the sky and people spoke ______ of the experienced 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.