A、John is late for the appointment. B、John has another appointment with his roommate. C、The man told John to meet them at 6:00.

M: I much prefer Mrs. Brown’s lessons. I’ve got a book of notes from her lessons. But I have got nothing from Mr. Bass’.
W: Maybe you needn’t take notes in Mr. Bass’ lessons. It is easy to remember what he says.
Q: What does the woman imply?

W: I thought John was going to join us.
M: I couldn’t reach him this afternoon, but I left a message with his roommate that he should meet us here at seven.
Q: What can we learn from the conversation?