听力原文：M: I have to leave now.W: So soon？ Can't you stay a little longer？M: I wish I cou
听力原文：M: I have to leave now.
W: So soon？ Can't you stay a little longer？
M: I wish I could, but it's very late now. Thank you for your wonderful meal.
W: I'm glad you enjoyed it.
What has the man been treated with？