Question

Not until we have had a chance to discuss it thoroughly ________ perfectly．

1. A.
   the problem has been settled
2. B.
   has the problem been settled
3. C.
   will the problem be settled
4. D.
   the problem was settled

Answer 1

C
考查倒装句。Not until……that……当主句是否定句时，它引出的意思是“直到(某时)(某动作)才(发生)”，这时候常会出现“not until…”的结构，如果将“not until…”的结构放在句首，那么主句要写成倒装句。