80. 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 (E) flourishing at the same time as those were
1. 比较结构:一级排除D,E 比较的时候,尽量把比较放在一个句子中进行(哪怕是个定语从句),也不要在分词短语中,ets认为这样的比较有缺陷 2. 代词: those一级排除C,D,E In choices C, D, and E, the plural pronoun those has no plural noun to which it can refer. 没有歧义的时候补出动词多余,尤其在这儿,因为后边还有一堆介词短语,就更加显的笨拙, 1. 时态:二级排除B, At the same time asè明确是个一般过去的时间!!!!!!!!!!!!!! 过去完成时态一定要有一个过去时态的动词,并且完成时态发生在过去时态动作之前。 Choice A, the best answer, uses the simple past tense flourished to describe civilizations existing simultaneously in the past. Choice B wrongly uses the past perfect had flourished; past perfect tense indicates action that was completed prior to some other event described in the simple past tense: for example, "Mayan civilization had ceased to exist by the time Europeans first reached the Americas." è在此题里面没有过去完成时态的时间参照点è过去完成时态就这个一招: 要明确出现一般过去时态的动词
His studies of ice-polished rocks in his Alpine homeland, far outside the range of present-day glaciers, led Louis Agassiz in 1837 to propose the concept of an age in which great ice sheets had existed in now currently temperate areas. (A) in which great ice sheets had existed in now currently temperate areas (B) in which great ice sheets existed in what are now temperate areas (C) when great ice sheets existed where there were areas now temperate (D) when great ice sheets had existed in current temperate areas(B) (E) when great ice sheets existed in areas now that are temperate
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