单选题 —Never thought to see you here.
—______.
A．So did I. B．Oh, haven't you?
C．It's a small world. D．I'm well. Thank you. And you?

【正确答案】 C
【答案解析】[解析] 本题考查特定情景下的交际用语的表达。本句中两人不期而遇，根据语境和习惯表达应选择C——世界真小啊。A项应该用否定，B是反意疑问形式，D是询问某人最近情况的答语，这三项均不符合具体语境。