Innits of the Bering Sea were in isolation from contact with Europeans longer than Aleuts or Inuits of the North Pacific and northern Alaska.
（A） in isolation from contact with Eurpoeans longer than （B） isolated from contact with Eurpoeans longer than （C）in isolation from contact with Eurpoeans longer than were （D） isolated from contact with Eurpoeans longer than were （D） （E） in isolation and without contact with Eurpoeans longer than
D中were绝对要补，否则产生歧义！
isolated from contact with Eurpoeans longer than from。。。补出from 比较的应该是：IBS were in isolation from contact with Europeans与from contact with AINPNC比较
isolated from contact with Eurpoeans longer than were。。。补出were
longer than后为名词短语，比较从句结构不完整，导致比较对象引起争议。这道题目的比较是： 白勇解释：IBS were in isolation from contact with Europeans与AINPNC were in isolation from contact with Europeans比较 in isolation (from) 表达不简洁，直接可以用动词isolate from表达，排除ACE
其他解释： 两种补出方式（prep. or 动词）产生的意思完全不一样，所以要补出were消除歧义。
结论：不同主语之间的比较可以省略谓语动词，但前提是没有歧义。我看到网上有些说法，认为实意动词不能省略，但系表结构就可以。这种说法很片面，所以我特地举了一个系表结构而不省略的例子。引用一位前辈的话：“。。。ETS如此的 reluctant to purport 什么硬性的公理。如何将一个句子表达得准确，简洁，不产生歧义是ETS对句子改错的最高要求。有一些通常的做法，但是决不能生搬硬套。”
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发表于 2007-11-28 14:30:00
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