hardly...than; no sooner...when; scarcely...when____ had I reach

hardly...than; no sooner...when; scarcely...when
____ had I reached the airport ____ the plane took off.
【正确答案】：Scarcely;when
【题目解析】：本题考查固定结构。千万考要点透析】 Scarcely when是固定关联词组,意为“一…就……”,类似的关联词组有 Hardly when和 No sooner.than。这类词组出现时,主句用过去完成时,从句用一般过去时。