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求助885,Section08, 14
14,Salt deposits and moisture threateh to destroy the Mohenjo0Daro excavation in Pakistan, the site of an ancient civilization that flourished at the same time as the civilications in the Nole delta and the river valleys of the Tigros and Euphrates.
A,that florished at the same time as the civilizations
B,that had flourished at the same time as had the civilizations
答案是A,可是the same as 不要求前后对等吗,civilization后面怎么不加did?B的过去完成时虽然有点牵强,但用了助动词had,我就选它了。
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