题目内容:
Racial discrimination has still ______ in some parts of the U.S.A. since itafter the Civil War. A.been existed; has been done away
A.been existed; has been done away
B.existed; has been done away with
B.existed; has been done away with
C.been existed; has been done away with
C.been existed; has been done away with
D.existed; was done away with
D.existed; was done away with
参考答案:
答案解析: