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。玩的开心。 Goodbye. 再见，Enjoy yourself.玩的开心， I’m sorry to hear that.听到这个很难过，Help yourself.请随便吃。根据I’m going to have a trip to Window of the World.我要去世界之窗旅行，可知应该是预祝其玩的开心，故选B.
