Finally Mary was admitted by Beijing University,for which she 9（?）five timesA.had triedB.wa
问题描述：
Finally Mary was admitted by Beijing University,for which she 9（?）five timesA.had triedB.wa
trying C.has tried D.tried
答
最后玛丽终于被北京大学录取了,虽然她尝试了五次.
a 吧
表示在前一个动作完成前已经完成了