He isn’t very successful ________a singer but he is quite known ________his music.
The books sold ________millions in one day, and the publisher had to print another ten thousand copies.
--I think we are lost. I’ve no idea where we are. --I wish we __________the map with us.
The professor can answer almost any question __________we have about any history topic.
Due to the light pollution, stars are too faint _________with naked eyes in the urban area.
--Why won’t you go to Jim’s birthday party with us? --Well, I don’t like him, if you ________know.