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题目内容
（陇东学院-大学英语(专升本)）
90. (单选题) Hardly had they arrived at the airport ___the plane started to leave.(本题1.0分)
A、 than
B、 then
C、 until
D、 when
A、 than
B、 then
C、 until
D、 when
参考答案