A、Training. B、Sales. C、Service. D、Quality. B此题询问明天将讨论什么问题。在对话中女士提到了sales problem(销售问题)，因此选项B正确。

W: Have you ever thought about your future career?
M: Sure. I’d like to be an engineer.
Q: What does the man want to be in the future?

M: This new model of the car doesn’t sell well here.
W: Well, we’ll discuss the sales problem tomorrow.
Q: What problem will they discuss tomorrow?