题目内容：

单选(1068):-Good morning ,Room Reservations.May I help you ,sir?
-Good morning ,Room Reservations.May I help you ,sir?
-Yes,I'd like to book a room.
-____.Which date would that be?
A.Thank you ,sir
B.That's all right,sir
C.You're welcome.sir
D.No trouble,sir

优质解答

C
口语体用法
欢迎,先生.
接待员的礼仪用语