问题补充：
－We’re going on a trip to Sanya.－
A. Congratulations.
B. Good luck with your trip.
C. It’s a pleasure.
D. Come on.
答案：
A. Congratulations.
(答案→)B. Good luck with your trip.
C. It’s a pleasure.
D. Come on.
解析：
试题分析: 句意：我们要去三亚旅行。一路平安。Congratulations.祝贺， Good luck with your trip.一路平安，It’s a pleasure.是一件幸事，Come on算了吧。根据trip旅行，可知是对旅行顺昨的祝福，故选B
