问题
Racial discrimination has still ______ in some parts of the U.S.A． since itafter the Civil War.
A:been existed； has been done away
B:existed； has been done away with
C:been existed； has been done away with
D:existed； was done away with
B:existed； has been done away with
C:been existed； has been done away with
D:existed； was done away with
正确答案是：
