单选题 I ______ an old friend at the supermarket this morning.
A) ran out C) ran over
B) ran into D) ran away

【正确答案】 B
【答案解析】句子意为：今天早上我在超市里偶然碰见了一个老朋友。本题测试词组辨析。ran out耗尽；ran into偶然遇见；ran over撞倒，温习；ran away跑开。