No sooner________ at the airport than he was informed that the flight had been canceled.
考查否定倒装和时态。否定词no sooner前置， 主语和谓语倒装，这个主谓结构和than后面的主谓结构对比先后，应该用过去完成时；no sooner......than......刚......就......。 翻译：他刚到机场就被告知航班已经被取消了。