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A
did I have
B
do I have
C
should I have
D
would I have
正确答案 :A
解析
【精析】A句意:直到最近我才了解了一些关于引导火箭的情况。倒装句型题。not until…(直到……才……)置于句首时,句子要部分倒装。根据句中的时间副词recently(最近,近来,表示时间点),可以判断动词应该用过去时,因此选择A。注意recently和完成时连用时表示时间的长度。例如:I haven’t been sleeping well recently.
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