Mary was seven years old.Her parentshad recently moved to a new town,and so Mary was going to a differentschool from the one she had been at forsome years.It was a few kilometresfrom the house which she now lived inwith her parents,but there was aschool bus that went around picking uppupils every morning and bringing themback to their homes every afternoon,and as both of Mary’s parents had togo to work every morning,she alwayswent on this bus.She had to be at acomer twenty metres from her front doorby half past eight every day and thebus was usually on time.Mary’s parents always set theiralarm clock every evening so that noneof them would be late,but one morn-ing the alarm failed to go off,and itwas not till a quater past eight thatMary’s mother suddenly woke up, Mary was seven years old .Her parentshad recently moved to a new town, and so Mary was going to a differentschool from the one she had been at forsome years.It was a few kilometresfrom the house which she now lived inwith her parents, but there was aschool bus that went around picking uppupils every morning and bringing themback to their homes every afternoon, and as both as Mary’s parents had to to work every morning, she alwayswent on this bus.She had to be at acomer twenty meters from her front doorby half past eight every day and thebus was usually on time.Mary’s parents always set theiralarm clock every evening so that none of them it be late, but one morn-ing the alarm failed to go off, and itwas not till a quater past eight thatMary’s mother suddenly woke up,