问题
选择题
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
答案：D
题目分析:句意：直到他三年前从教育退休，他才考虑去国外度假。not until结构位于句首时，主句使用部分倒装语序，排除A、C选项，根据three years ago判断句子用一般过去时，答案选D。