--- When shall we restart our business?
--- Not until we our plan.
A. will finish
B. are finishing
C. are to finish
D. have finished
网友回答
A. will finish
B. are finishing
C. are to finish
(答案→)D. have finished
解析：考察时态。本句指的时间状语从句中用现在完成时，代替将来时，表示到将来的某个时间已经完成的事情。句意：—我们什么时候重新开始我们的生意？—直到我们制定好了我们的计划。AB项是明显错误。C项指的be to do sth表示注定做某事，不符合语境。故D正确。