题目内容
【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】not until位于句首时,主句采用部分倒装,即把助动词或情态动词提至句首,其后的动词用原形,或be动词提前,后面的动词仍用原来的形式。由three years ago可知用一般过去式,故选D。
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