[听力原文]
M: Miss, what time is Flight 502 for Chicago due to depart
W: It leaves at 3:50, but you must check in one hour before departure.

When must the man check in（）

A．He hates playing chess.
B．He can play chess well.
C．He does not play chess.
D．He enjoys playing chess.

A．To tell her about his sister’s arrival.
B．To invite her to a party.
C．To discuss some business affairs.
D．To ask for a day’s leave.