—I m going to America with my parents for our vacation.—!A. Good luckB. I hope you come b

问题补充：

—I m going to America with my parents for our vacation.

—!

A. Good luck

B. I hope you come back soon

C. Have a good time

D. Congratulations

答案：

A. Good luck

B. I hope you come back soon

(答案→)C. Have a good time

D. Congratulations

解析：句意:-我打算和我的父母去美国度假。-祝你玩得愉快！Good luck. 祝你好运；I hope you come back soon.我希望你早点回来。这个回答不符合西方人的表达习惯；Congratulations.祝贺你！Have a good time.祝你玩得愉快。根据句意可知，说话人要去度假了，故应该祝他玩得高兴。故选C。