M: Sure, but I can't leave now. I have an appointment with my professor at 3o'clock. What was said before this conversation?
Ans: W: John, do you want to go swimming with me today?

M: Well, but Catherine's is cheaper than mine. What was said before this conversation?
Ans: W: Your English dictionary is cheaper than the one I bought yesterday.

W: It's very good. The actors and actresses are all very good. Don't you think so? M: Yes. The acting is excellent and so is the music. W: Yes. I like it very much. What was said before this conversation?
Ans: M: What do you think of the opera?

M: This time I will not make a mistake again. What was said before this conversation?
Ans: W: Lucy told me she would meet you at the gate of the station.