问题补充：
--- Sorry, Im afraid I can go camping with you. I have to make a good preparation for the entrance college examinations.
--- ! We can camp together next time.
A. Don say so
B. Congratulations
C. Good luck
D. Don mention it.
答案：
A. Don say so
B. Congratulations
C. Good luck
(答案→)D. Don mention it.
解析： 考查交际用语。 题意为 对不起，我不能跟你去野营了。我得准备我的大学入学考试。 没事，下次再去。根据题意得出C项。
考点 交际用语。
