题目信息
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 and1960'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
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E:it assigned to do
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