高等继续教育 / 大学英语I
正确率：100%
题型描述: 单选题
It may still be many years ＿＿＿this problem could be finally settled.
A.before
B.after
C.until
D.unless
It may still be many years ＿＿＿this problem could be finally settled.
A.before
B.after
C.until
D.unless
参考答案：
佳题速递：