Problem: Given the question: M: What do you mean? It was my fault? If it were, surely I'll take all responsibility for it. What was said before this conversation?
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The answer is:
W: What an accident! If you've been careful, things would not be as they are.

Problem: Given the question: M: If it's a nice day of course. What was said before this conversation?
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The answer is:
W: We can all go swimming in the river after the basketball match.

Problem: Given the question: W: Not at all. What was said before this conversation?
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The answer is:
M: Would you mind turning down the TV a bit? I'm answering the phone.