It is said in the book that Thomas Edison the world-leading inventor for sixty years. A. would be B. has been C. had been D. was 题目和参考答案——青夏教育精英家教网—

题目内容

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

解析:

根据括号内的1847—1931可知，此处应填过去时态；另外，由于没有另一个过去的时间或动作与之比较，故不能用过去完成时，即只能选D。

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