根据对话内容，在每个空白处填入适当的词语或句子，使其连贯完整。
R：Did you see the accident？
K：（1）_____________________.
R：（2）_____________________？
K：I was driving then.
R：（3）_____________________？
K：Ok.The boy was walking across the street when the car came fast around the corner and it seemed that the driver didn't see the boy.
R：（4）_____________________？
K：When the driver saw the boy，it was too late. The car knocked the boy down and ran away.
R：（5）_____________________？
K：I called the hospital and another person called the police.
R：Ok.Thank you.