W: No, of course not. What was said before this conversation?
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Answer: M: Do you mind turning down the radio? I am doing my homework.

W: I call my parents once a month. But they call me every two weeks. What was said before this conversation?
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Answer: M: How often do you call your parents, Janet? I call mine every Saturday and every Sunday.

W: Great, I am doing a report on the rain forest. Maybe I can get some new information to add it. What was said before this conversation?
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Answer:
M: Do you want to go to the lecture this weekend? I heard that the guy who is going to deliver the lecture spent a year living in the rainforest.