麻烦大家帮我看看这道题~

zoeyy1130

In 1994 the white house named Dr RuthR. Faden chairperson of the federal advisory committee of experts they assigned to do a report on the history and ethics of the government’s radiation experiments on humans in the 1950’s and 1960’s .

A. they assigned to do

B. to be assigned doing

C. that was being assigned doing

D. assigned for doing

E. it assigned to do

该怎么理解句子结构和意思呢？
我选的是A,答案是E。
谢谢~

wyw1018

主语：the white house
谓语：named
宾语：Dr RuthR. Faden
宾补：chairperson of the federal advisory committee of experts
定语从句修饰the federal advisory committee of experts：it assigned to do a report on the history and ethics of the government’s radiation experiments on humans in the 1950’s and 1960’s

zoeyy1130

wyw1018 发表于 2013-10-15 13:10
主语：the white house
谓语：named
宾语：Dr RuthR. Faden

谢谢～可是,it assigned 的it是形式主语还是什么?指代什么呢?

wyw1018

zoeyy1130 发表于 2013-10-15 15:35
谢谢～可是,it assigned 的it是形式主语还是什么?指代什么呢?

the white house

zoeyy1130

wyw1018 发表于 2013-10-15 17:27
the white house

谢谢指导～

大叮田

感觉IT指代歧义很大。这个题不好