It is said in the book that Thomas Edison ( )the world leading inventor for sixty years.时态
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It is said in the book that Thomas Edison ( )the world leading inventor for sixty years.时态
本题给的答案是was,我开始选的时had been.
答案
has been
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我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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