高等继续教育 / 高级英语I
正确率：100%
题型描述: 单选题
The first man who brings _ _ _ _ _ _ _ a serious social problem is often considered dangerous or mad.
A.up
B.off
C.in
The first man who brings _ _ _ _ _ _ _ a serious social problem is often considered dangerous or mad.
A.up
B.off
C.in
参考答案：