标题: 一道时态的题！救助！！！ [打印本页] 作者: wellmichelle 时间: 2012-10-5 15:35 标题: 一道时态的题！救助！！！ Devastated by the catastrophic plane crash, the residents of Cook County accused the Federal Aviation Administration of failing to warn the pilots that the area was experiencing deadly wind shears during the prior weeks. A.was experiencing deadly wind shears B.has experienced deadly wind shears C.experienced deadly wind shears D.has been experiencing deadly wind shears E.had been experiencing deadly wind shears