求助：GWD31-37

bluefirmamen

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

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正确E

但始终觉得这个it多了，会引起run-on, 求助……

bluefirmamen

uhmm…点解，谢谢

payo

省略that
C其实就是提示你的

bluefirmamen

up~