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 Tigers 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 E flourishing at the same time as those were
正确选项(A),想问一下为什么civilizations后面的如果加上did是多余的?看到有个帖子说这里不加did没有歧义,所以可以不加。那么加上就是awkward and unnecessay“了吗?不加不会不平行吗?——各位NN,应该怎么解释?
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