C
另一个问题：
如果把it is said in the book that 去掉呢，应该选哪个？

【 在 lytong 的大作中提到: 】
: 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
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FROM 58.37.127.*