问题描述:
It is said in the book that Thomas Edison(1847-1931)______the world leading inventor for 60 years.
A would be B has been C had been D was
为什么不是B 不是有for 60 years吗
怎么区分一般过去时和现在完成时
A would be B has been C had been D was
为什么不是B 不是有for 60 years吗
怎么区分一般过去时和现在完成时
问题解答:
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