When the traffic lights are red, we _______ stop.

—Jenny，how did your math exam go?—I thought I ________，but in fact I came in the top 10% in the class.

The haze or smog was so serious that the winter running _________.Some students complained as they ran

You ______ your coffee before it turns cold.

—Can I pay the bill by check?—Sorry，sir．But it's the management rules of our hotel that payment     be made in cash．