扫描二维码，直接登录
题库 / Prep2007E1-SC-21
When Nigeria achieved full independence in 1960, they had already established a federal political structure consisting of three regions based on the three major population clusters that were in its borders.
they had already established a federal political structure consisting of three regions based on the three major population clusters that were in
they already had established a federal political structure consisting of three regions that was based on the three major population clusters inside
they already had established a federal political structure that consisted of three regions based on the three major population clusters in
it had already established a federal political structure that consisted of three regions based on the three major population clusters within
it already had established a federal political structure consisting of three regions being based on the three major population clusters it had within
E，凡是being done作定语或状语，意指被动动作的都是错误的，直接用过去分词
这是分词短语呀～选项D中的based on是过去分词短语；选项E中的being based on是现在分词短语。这里都是作定语的，属于简化定语从句嘛～登录 或 注册 后可以参加讨论
E、非常redundancy，加了it had，改变句意
1）already的位置有没有错误？
2）being based有没有错误: 我看到讨论里面好多being done的解释，这个语法点一般是怎么考的？
3）后面it had加在这里可以么？
being done 表示同时性登录 或 注册 后可以参加讨论
E, it had,: it had three major population clusters; based on three major population cluster
not logic.
clusters it had within its borders，已经说了是在它的边境的，不用再说是它拥有的。
DE对比：E中it had和its表意重复，其次"being based on"中being多余