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 flurished 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 (E) flourishing at the same time as those were
请问这里“ the site of an ancient civilization that flourished at the same time as the civilizations”中“that”是不是可以去掉呢?小弟觉得应该是可以去掉的,但是因为这里要强调是过去发生的事,所以用从句要比用后置定语更清楚,就用了从句表达,不知是这样吗?还请NN指点呀~