问题
选择题
Not until we have had a chance to discuss it thoroughly ________ perfectly.
A．the problem has been settled
B．has the problem been settled
C．will the problem be settled
D．the problem was settled
答案
答案：C
答案：C
解析 句意为：直到我们有机会充分讨论这个问题，它才能被圆满解决。not until置于句首，主句用部分倒装，助动词置于主语前；由until引导的时间状语从句用的是现在完成时(表即将完成的动作)可知，主句用一般将来时。