--Can I go back home now?You to leave until you your work.A. won’t allow; fini

问题补充：

----- 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

答案：

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？——直到你完成你的作业才能让你回家。可知主句描述的是将来的动作，故用将来时态，从句描述的是某个时间点前完成的动作，故用完成时态。固定句式not ……until 直到……才，故选C。