M: But he was actually covering what we should learn. What was said before this conversation?
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Answer: W: Mr. Stone's lessons were a waste of time. He was always telling Funny stories.

M: Let's see. You already have three fifteen cent stamps and two twenty-five cent stamps on it. You only need one five-cent stamp. What was said before this conversation?
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Answer: W: Do I have enough postage on this package?

M: Yes. He was picked up by a policeman. What was said before this conversation?
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Answer:
W: Have you found your youngest brother, Tom?