A-A+
It is said in the book that Thomas Edison (184
问题详情
It is said in the book that Thomas Edison (1847—1931)______the world leading inven- tor for sixty years.
[A] would be
[B] has been
[C] had been
[D] was请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：D
D [解析]本题考点为时态。A项为过去将来时，表示“过去的将来”；B项为现在完成时，表示到现在为止，一直”；C项为过去完成时，表示“在过去一段时间一直”；D项为一般过去时，表示“过去是”。由于时间状语没有表明60年的具体时间，故排除C。A、B不符合题意。[知识拓展]延续性动词过去式本身即可接时间状语。如：He stayed in New York for several months last year．
