问题
选择题
158. It is said in the book that Thomas Edison _____ the world leading inventor for about sixty years.
A．would be
B．has been
C．was
D．had been
答案
C
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158. It is said in the book that Thomas Edison _____ the world leading inventor for about sixty years.
A．would be
B．has been
C．was
D．had been
C