问题补充：
Our English class is so that all of us are in it.
A. interesting, interesting
B. interested, interested
C. interesting, interested
D. interested, interesting
答案：
A. interesting, interesting
B. interested, interested
(答案→)C. interesting, interested
D. interested, interesting
解析：interesting 修饰物的，be interested in应该主语为人，故选答案为C
