It was on his way to the station _____ he received the news that his lost daughter had been found.
Black clouds had completely ___ the sun.
It was an unpleasant subject ____ we _____ for a long time.
It must have rained last night, ________ the ground is wet now.
The serious expression of the captain kept his crew _________.
The tomato juice left some _____ on a customer’s skirt, which made the waitress nervous.