听下面一段较长对话，回答以下小题。
【小题1】Who might the speakers be?

A．Police officers.

B．Observers.

C．Passengers.

【小题2】What did the old lady say?

A．She didn’t see anything.

B．The traffic lights broke down.

C．The red car was driving very fast.

【小题3】What were the kids doing when the accident happened?

A．Crossing the street.

B．Playing in their front yard.

C．Standing on the street corner.

【小题4】Which of the following caused the accident according to Mr Bates?

A．The red car.

B．The dog.

C．The blue car.