Never before buying a computer, but now it seems a necessity in my everyday life.A. did I

Never before buying a computer, but now it seems a necessity in my everyday life.
A. did I think of
B. have I thought of
C. I thought of
D. I have thought of

A. did I think of(答案→)B. have I thought ofC. I thought ofD. I have thought of解析：考查部分倒装。Never是表否定意义的词，放在句首时，句子谓语要部分倒装，排除C,D；根据never和before,可知句子应该用现在完成时态，所以选B。

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