The question under discussion here is ______ of the "white pollution".
The candidate was about to get in the car _ suddenly a man with a mask appeared and shot at him.
___ was obvious ___ manager of the coffee shop was waiting for Li Fang to leave.
Prices of daily goods ____ through a computer can be lower than store prices.
Tom was about to close the window ___ his attention was caught by a bird.
Well, towards nightfall, I found myself ___ out to sea by a strong wind.