【正确答案】
A
【答案解析】[听力原文] 6-7
W: Now, Mr. White, (6)did you see the accident clearly?
M: Oh, yes. I was standing outside the department store.
W: Do you know what time it happened?
M: Yes, it was 4:30 by my watch.
W: Good, now, was the truck going fast?
M: Yes. Well, perhaps the driver thought they were going to change to green. (7)But they were red.
W: Are you sure, Mr. White?
M: Yes, absolutely sure.
W: Well thanks a lot, Mr. White. Goodbye.
M: Goodbye.
6. Q: What are the two speakers talking about?
[解析] 根据原文(6)处可知，这位女士说：“怀特先生，你是不是很清楚地看到了这次事故?”此后两人对话围绕这一话题展开，故选A。