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He won't go to bed___he ___his homework.A.before,finish B.until,will finish C.until,finishes请说明原因

题目详情
He won't go to bed___he ___his homework.A.before,finish B.until,will finish C.until,finishes
请说明原因
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答案和解析
选C.
主将从现+not...until...的用法.