题目类型：
单选题
题目内容
I ran ____ an old friend of mine the other day when I did some shopping downtown.
正确答案
C
题目解析
ran after 追赶，run about 乱跑 , run across 偶然遇到，run over 碾压过。题意为前几天我在市区购物时碰到了我的一个老朋友。因此选C