In the seventh century B.C., the Roman alphabet was adapted from the Etruscan alphabet, which in turn had been adapted in the previous century from a western Greek alphabet, which itself had been adapted earlier in the same century from the Phoenician alphabet.


which itself had been adapted earlier

adapting itself earlier

itself being adapted earlier

having been earlier adapted itself

earlier itself having been adapted

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考题讲解

题目分析：
本题中出现了反身代词itself，这种代词在GMAT考试中远不如普通代词（it、they等）常见，考生们需要从五个选项中注意理解反身代词的用法。

选项分析：

A选项：Correct. 本选项在逻辑和语法上均是正确的。本选项是定语从句，which后的itself是反身代词，此处做主语的同位语（先行词在该定语从句中充当主语）。

B选项：本选项的adapting是现在分词，做定语修饰a western Greek alphabet。这一点本身没有问题，但是，现在分词表示其同其逻辑主语的关系是主动关系，即，a western Greek alphabet主动的改编（adapt）了自己（此时，反身代词itself做adapt的宾语）。在逻辑上，只能是a western Greek alphabet被改编（adapt），而不能主动发出改编这个动作。

C选项：本选项是一个独立主格结构，但是在语法上不正确。因为，反身代词不能独立作主语，只能做主语的同位语。

D选项：having been earlier adapted itself中的itself位置不正确。同位语需要紧贴着先行词，放置在其身后。

E选项：本选项是独立主格结构，错误同(C)。

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