答案：B

题目分析：考查时态，由前面的句子we were told that可以知道事情是发生在过去的过去，所以是过去完成时，所以选B，句子意思“事故后当我们到达那的时候，我们被告诉伤员已经被送到医院”，注意句子用的是被动式

点评：动词时态是高考语法永恒的话题，分清时态之间的差别至关重要

即学即练：They are living with their parents for the moment because their own house __________.

A. has been rebuilt     B. is being rebuilt

C. is rebuilt      D. has rebuilt

选B