看了讨论不解决我的问题, 再问OG11紫33

1.
            Carbon-14 dating reveals that the megalithic monuments in Brittany are nearly 2,000 years as old as any of their supposed Mediterranean predecessors.

(A) as old as any of their supposed

(B) older than any of their supposed

(C) as old as their supposed

(D) older than any of their supposedly（B）

(E) as old as their supposedly

Choices A, C, and E do not state the comparison logically. The expression as old as indicates equality of age, but the sentence indicates that the Brittany monuments predate the Mediterranean monuments by 2,000 years.

关于as...as的问题：如果as....as只能是同等的比较，那为什么很多这样的用法：sth. is twice as many as....,    sth. runs 3 times as fast as.....,

我不太明白。

谢谢，你一句话点通我没开的那一窍。