Not until he retired from teaching three years ago having a holiday abroad.Ahe had cons

问题补充：

Not until he retired from teaching three years ago having a holiday abroad.

Ahe had considered

Bhad he considered

Che considered

Ddid he consider

答案：

A. he had considered

B. had he considered

C. he considered

(答案→)D. did he consider

解析：Not until位于句首时句子要倒装，consider having a holiday abroad这个动作发生在retire之后，所以用一般过去时。

【考点】特殊句式—倒装。