问题补充:
My summer camp isn good fun, but it is real learning experience for me.
A. a; /
B. the; a
C. /; a
D. a; the
答案:
A. a; /
B. the; a
(答案→)C. /; a
D. a; the
解析:C考察冠词,句义:我参加的夏令营一点都不好玩,但是对我来说是一次真正的学习的经历。Fun是不可数名词,表示泛指;experience在此是可数名词经历,表示泛指,所以使用不定冠词。故C正确。