614.Salt deposits and moisture threaten to destroy the
(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
为什么不用完成时,相对于threaten来说这个动作是以前就已经完成了的,所以我选了B。答案是A
614.Salt deposits and moisture threaten to destroy the
(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
为什么不用完成时,相对于threaten来说这个动作是以前就已经完成了的,所以我选了B。答案是A
过去完成时是过去的的过去, 这里只有过去.
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