题目

It is said in the book that Thomas Edison (1874–1931) _______ the world leading inventor for sixty years. A. would be      B. has been      C. had been       D. was 答案：D 解析: 爱迪生已经于1931年去世，所以“爱迪生是世界上最重要的发明家”是一个纯过去的叙述，与现在时间没有关系。

查看本题答案和解析