分类：教育/科学-外语学习-英语考试
问题：It'ssaidinthebookthatThomasEdiso? 
It's said in the book that Thomas ison (1847-1931) ______the world leading inventor for 60 years.A would be B has been C had been D was答案是Ｄ　为什么这里不用完成时　谢谢老师 　
回答：It's said in the book that Thomas Edison (1847-1931) ______the world leading inventor for 60 years.
这里是在称述一个事实,就是爱迪生是个发明家.
而爱迪生已经去世了,所以他是发明家也是过去的事情了.所以用过去式就可以了.