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It is said in the book that Thomas Edison (1847—1931) ________ the world-leading inventor for sixty years.
A. would be B. has been C. had been D. was
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It is said in the book that Thomas Edison (1847-1931) _____ the world leading inventor for sixty years.
It is said in the book that Thomas Edison(1847-1931)________ the world leading inventor for sixty years．
would be
has been
had been
was