GWD-31-37语法题求解答

Marinamai

In 1994the white house named Dr RuthR. Faden chairperson of the federal advisorycommittee of experts they assigned to do a report on the history andethics 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

Marinamai

答案是E，求解释！谢谢大牛们