【题目】Hardly ________ when she ________ someone knocking at the door.
A. did she sit, heard B. did she sit, had heard
C. had she sat, had heard D. had she sat, heard
在线课程【答案】D
【解析】
试题分析：考查倒装句和时态。本句中放在句首的副词hardly，是一个表示否定含义的副词，放在句首谓语动词要使用部分倒装的形式。且hardly....when....意为“一...就...”，主句的动作发生在从句之前，时态要保持一致。句意：她一坐下来就听见有人敲门。故D正确。