Question

Not unti his fellows criticized him ______ to admit his mistake.

1. A.
   does he begin
2. B.
   did he begin
3. C.
   began he
4. D.
   had he begun

Answer 1

B
not until 位于句首，句子使用部分倒装。观察句子，从criticized可知句子应与过去有关，排除A；C答案为完全倒装。
考点：考查倒装。
点评：倒装分为部分倒装和完全倒装。要分清他们的概念及使用规则。