求助：新prep251. (GWD-1-Q29)

251.
        (29626-!-item-!-188;#058&004307)
        (GWD-1-Q29)

Faulty voting equipment, confusing ballots, voter error, and problems at polling places have been cited by a new study of the 2000 United States presidential election, which estimated that they did not count 4 million to 6 million of the 100 million votes cast.

A. Faulty voting equipment, confusing ballots, voter error, and problems at polling places have been cited by a new study of the 2000 United States presidential election, which estimated that they did not count 4 million to 6 million of the 100 million votes cast.

B. Citing faulty voting equipment, confusing ballots, voter error, and problems at polling places, a new study of the 2000 United States presidential election has estimated that 4 million to 6 million of the 100 million votes cast were not counted.

C. Citing faulty voting equipment, confusing ballots, voter error, and problems at polling places, 4 million to 6 million of the 100 million votes cast were not counted in the 2000 United States presidential election, a new study estimates.

D. A new study has cited faulty voting equipment, confusing ballots, voter error, and problems at polling places in estimating that 4 million to 6 million of the 100 million votes that were cast had not been counted in the 2000 United States presidential election.

E. A new study of the 2000 United States presidential election, citing faulty voting equipment, confusing ballots, voter error, and problems at polling places, has estimated 4 million to 6 million votes had not been counted of the 100 million votes cast.

全划线，乍一看非常晕。。。

A、B错误明显，但C D是否是因为错在误用了过去完成时？还有别的错误么？请NN逐个分析下吧～

看到全划线的我也晕，没办法 只能硬着头皮看，尽量找自己已经掌握了的错误点，还有就是首先定位跟原句表达比较接近的选项（比如原题开头用的是一大堆错误的问题，那么选项中"A new study"类的这种转述说法的，变换了主语 把一个生动活泼的句子变成了一个一般般没有特殊生气的选项 我一般都先排除放放 先看跟原句子表达比较近似的——纯粹个人总结。

关于选项问题：试作解释，不当请指正：

C的错误：Citing....开头肯定后面叫主语，可是citing句子逗号后面跟的却是"4 million to 6 millon...." ."4 million to 6 million" citing逻辑含义不对。

D的错误：

（1）最大的错误：把原句子里"of the 2000 United States presidential election" 变成了"in the 2000 United States presidential election" （cast had not been counted in the 2000.....)，改变了句意。原句子意思是说"2000年大选的一个研究如何如何"，D选项改变后的意思是说“在2000年的大选中，选票没有被统计”,言外之意是在其他年代的（比如2009年）的大选中选票被统计了！这篡改了原句子意思。错误。

（2）D的另外一个错误："votes that were cast"中的"that were"多余，可以去掉。直接用过去分词cast修饰votes.

我说的应该没错吧