A、The woman has listened to Prof. Smith’s lecture. B、The woman shouldn’t go to Prof. Smith’s lecture. C、Prof. Smith’s lecture is

M: Excuse me, Prof. Johnson, when I communicate with foreigners, sometimes I don’t know what they mean although I can catch every word.
W: This is why I always suggest its culture shouldn’t be neglected when you learn a foreign language.
Q: What does the woman mean?

W: The bulletin says Prof. Smith will deliver his speech on physics tonight at the lecture hall, and many classmates are rushing there.
M: They are less likely to do that if they had listened to his lecture before.
Q: What does the man imply?