----- Can I go back home now? ----- You to leave until you your work.
A. won’t allow; finish
B. won’t be allowed; will finish
C. won’t be allowed; have finished
D. won’t allow; will finish
网友回答
A. won’t allow; finish
B. won’t be allowed; will finish
(答案→)C. won’t be allowed; have finished
D. won’t allow; will finish
解析：考查时态。句意：我现在可以回家了吗？——直到你完成作业后才能让你回家。可知从句描述的是某个时间前完成的动作，故用完成时态。主句表示的是将来的动作，结合固定结构not ……until可知选C。