It is said in the book that Tomas Edison (1847-1931) _______ the world leading inventor for thirty years.
A.would be | B.has been |
C.was | D.had been |
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It is said in the book that Tomas Edison (1847-1931) _______ the world leading inventor for thirty years.
A.would be | B.has been |
C.was | D.had been |