问题标题：
He_finishhishomework_hisDadcameback.A.not;untilB.didn't;untiHe_finishhishomework_hisDadcameback.A.not;untilB.didn’t;untilC.won’t;beforeD.isn’t;after
问题描述：
He_finishhishomework_hisDadcameback.A.not;untilB.didn't;unti
He_finishhishomework_hisDadcameback.A.not;untilB.didn’t;untilC.won’t;beforeD.isn’t;after
毛政元回答：
B
not.until知道.才.
他直到他爸爸回来才写完作业
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