单选题 -It turned out she went to the same school as my sister.
-Well !______
A. You live and learn, don't you? B. It turned out all right, didn't it?
C. It's a small world, isn't it? D. I wouldn't bet on it.

【正确答案】 C
【答案解析】这里说：“她和我妹妹上了同一所学校”，另一个人就感慨这世界真小。故选C。