The tomato juice left some _____ on a customer’s skirt, which made the waitress nervous.

The boy led his mother to the ________ of the accident.

 —What’s the market ______ of their car in China?—About 18 percent at present.

Burning all the lights in the classroom will be a great______ on electric power.

Seeing the happy ______ of boys playing on the playground, I can’t help thinking of my childhood.