【题目】Not until he retired from teaching three years ago having a holiday abroad.
A. he had considered
B. had he considered
C. he considered
D. did he consider

【答案】D
【解析】句意：直到三年前从教育上退休，他才考虑去海外度假。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。故答案选D。