250-14

14.   Salt deposits and moisture threaten to destroy the Mohenjo-Daro excavation in Pakistan, the site of an ancient civilization that flourished at the same time as the civilizations in the Nile delta and the river valleys of the Tigris and Euphrates.

(A) that flourished at the same time as the civilizations

(B) that had flourished at the same time as had the civilizations

(C) that flourished at the same time those had

(D) flourishing at the same time as those did（A）

(E) flourishing at the same time as those were

the same。。。 as。。。中，same 和as 中的内容需不需要对等，觉得这里time 和 civilization 不相干的两种东西呀，怎么能一样呢？

要比也应该是the same time as that of the civilizations 或是两个句子比，象b.只不过它的时态不好罢了。