单项选择题

Conversation 2
[听力原文]8-10
W: I’d like to book a train ticket for Beijing, please
M: Beijing. What time
W: Next Monday, April 11th.
M: All right. Do you want a seat ticket or a sleeper ticket
W: Sleeper, please.
M: OK. 245RMB.
W: Here is the money.
M: Here is the ticket, thanks.

When is the woman leaving for Beijing()

A.April 10th.
B.April 11th.
C.August 10th.
D.August 11t