Problem: Given the question: M: What difference does it make? They're both excellent painters. And I think we just need to check who is available the day after tomorrow. What was said before this conversation?
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The answer is:
W: I can't make up my mind whether to ask Larry or Bill to paint the house.

Problem: Given the question: W: Hm, that would make a big difference. What was said before this conversation?
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The answer is:
M: If Professor King gave us one more week, we would be able to complete the task.

Problem: Given the question: W: I must admit that I felt sleepy during the two hours. What was said before this conversation?
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The answer is:
M: I have never seen such an interesting show. I hope you enjoyed it as much as I did.