the dog sled race was about to begin . susan's team of dogs was lined up at the starting gate . susan stood behind them . the air was so cold that she could see her breath . other team were lined up,too ,and the dog s were excited . susan kept her eyes on the clock . at exactly ten o'clock, she and the other racer yelled,''mush'' the dogs knew that meant "go" they leapt forward and the race began!