问题补充：
-Could you tell me something about that boy?
-Sorry, I don’t know anything about him. We are .
A. friends
B. classmates
C. strangers
D. neighbors
答案：
A. friends
B. classmates
(答案→)C. strangers
D. neighbors
解析：根据句子的内容I don’t know anything about him，可知答案为C，表示是陌生人。
