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.in
B.out
C.up
D.on
The first man who brings ＿＿＿ a serious social problem is often considered dangerous or mad.
A.in
B.out
C.up
D.on
参考答案：
佳题速递：