—Hello! This is travel agency office—Hello! I'd like to book two tickets for Qing Western

—Hello! This is travel agency office．
—Hello! I'd like to book two tickets for Qing Western Tombs．
— ．
A. Of course, please
B. At your service
C. My pleasure
D. A moment, please

A. Of course, pleaseB. At your serviceC. My pleasure (答案→)D. A moment, please解析：A．Of course, please 当然，请便，B．At your service随时为你服务， C．My pleasure不用谢， D．A moment, please请稍等，句意：——你好！这里是旅游办事处办公室。——您好，我想预定两张清西陵的票。——请稍等。所以选D。

感谢回答，我学习了