Question: W: More than you would believe. What was said before this conversation?
Answer: M: Did it cost very much to stay overnight in the hotel?

Question: M: Terrible. It seems like the more the professor talks the less I understand. What was said before this conversation?
Answer: W: You took an optional course this semester didn't you? How is it going?

Question: M: Certainly. We arrive there at ten and leave at twelve. What was said before this conversation?
Answer:
F: Do you have to change planes in Tokyo, Jim?