题目内容
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
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题目内容
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