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题库 / Prep2008E1-SC-232
The Acoma and Hopi are probably the two oldest surviving Pueblo communities, both dating back at least a thousand years.
both dating
both of which have dated
and each has dated
and each one dating
each one of which date
题目分析：
略。
选项分析：
A选项：Correct. 本选项在语法和逻辑上均是正确的。both dating back at least a thousand years是独立主格结构。
B选项：定语从句both of which have dated at least a thousand years就近修饰名词the two oldest surviving Pueblo communities，这是不正确的。可以被追溯到1000年以前的显然是Acoma and Hopi（请注意，这里the two oldest surviving Pueblo communities是泛指）。
C选项：并列连词and的加入使得前后两句话变成了并列关系。但在逻辑上，显然后半句是对前半句主语的修饰，不能是并列关系。
D选项：并列连词and身后的句子不完整。
E选项：each one of which引导的也是定语从句，该错误同选项(B)。
误选C，后半句对前半句是修饰作用，故C错。
BC现在完成时错误
B中which指代two oldest surviving Pueblo communities 带入后发现two与both重复
CD中的and割裂了两个句子，使得前后两句变成并列关系，而意思上后半句应当是前半句的修饰
bingo，我发现ron从来不用独立主格解释问题
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