GWD 31-37. confused

37. GWD31-37

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

answer is E. I choose D.

我觉得这句话在说，白宫任命某人为某研究委员会的头，所以E比较清楚。it 非常清楚地代表白宫-----某人被白宫named为委员会之头，而这个委员会是同样是白宫assigned to do sth,相比之下，D显然不够准确。

供参考

D，for doing我觉得不太好；

E，it指代white house，觉得assign to do比较顺眼；