Adam and Harry often take the 9：00 bus to the park．One day they missed the 9：00 bus，but they thought the 9：00 bus was late and decided to take the 9：30 bus．At nine fifteen，a bus came and they got on it．They thought this was the 9：00 bus，So they said to the bus driver，“It’s 9：15．Your bus is fifteen minutes late．”To their surprise，the bus driver smiled and said，“NO，my bus is not late．This is the 9：30 bus．My bus is fifteen minutes early.”
