33. Susan: Excuse me, where should I change trains for the Bannan Line?
Henry: I have no idea. Listen! Here comes the announcement.
Announcement: Passengers taking the Bannan Line, please change trains at this station.
Susan: _____
(A) Why didn’t you tell me? (B) I don’t know.
(C) I have to hurry. Thanks. (D) Don’t tell me.