问题补充:
---- Could you tell me something about the boy who helped you just now?
---- Sorry, I know nothing about him, we are .
A. friends
B. neighbors
C. classmates
D. strangers
答案:
A. friends
B. neighbors
C. classmates
(答案→)D. strangers
解析:根据题意可知我对他一无所知,那么我们应该是陌生人,stranger表示陌生人的意思,故本题选D。