一道英语补全对话题A:Can you tell me what you saw here today,about the

A:Can you tell me what you saw here today,about the car accident?
B:Well,I was__walking_ down the street when a car went very fast and hit the old man.
A:Where did it _happen__?
B:Just over there,at the street corner.
A:_What__happen then?
B:Two policemen came soon.They _told__the driver to send the old man_to__hospital.
A:Was the old man hurt badly?
B;I think_so__.He couldn't stand up_after__the accident.And there was some blood in the street.
A:So,what did you do_then__?
B:I saw the policemen_putting__the old man on a car to hospital and I left.I didn't know what was_going__on later.
A:Thanks

walking
happen
what did
asked to
so after
later
send going

waking
happen
what
told /required/asked to
so after
later
carried(抬上了车）sb.on a car going