问题补充：
- -I’m going to have a trip to Window of the World. ---.
A. Goodbye.
B. Enjoy yourself.
C. I’m sorry to hear that.
D. Help yourself.
答案：
A. Goodbye.
(答案→)B. Enjoy yourself.
C. I’m sorry to hear that.
D. Help yourself.
解析：句意：我要去世界之窗旅行。当别人要旅行，要表示祝福。A再见B祝你玩的愉快C听到这很遗憾D随便吃吧。故选B
