Problem: Given the question: M: It starts at seven. W: What time is it now? M: About six forty-five. We'd better hurry up. What was said before this conversation?
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The answer is:
W: What time does the movie begin?

Problem: Given the question: M: It doesn't matter. What was said before this conversation?
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The answer is:
F: Sorry, Mr. Li. I'm late. The traffic is bad.

Problem: Given the question: M: My mother too. What was said before this conversation?
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The answer is:
W: My mother is working in the First High School.