A、A fight in the street. B、A traffic accident. C、A robbery. D、A dead driver. B该题为判断题。根据上下文内容即可知道说话人在谈论什么，正确答案为选项B。

W: Now, Mr. Sun, did you see the accident clearly?
M: Oh, yes. I was standing outside the post office.
W: Can you remember what time it happened?
M: Yes, it was 4:25 by my watch.
W: Good. Now, was the truck going fast?
M: Yes. Well, perhaps the driver thought the traffic lights were going to change to green. But they were red.
W: Are you sure, Mr. Sun?
M: Yes, absolutely sure.
W: Well, thanks a lot, Mr. Sun. Good-bye.
M: Good-bye.
Q9: What are the two speakers talking about?