高等继续教育 / 专科英语II
正确率：100%
题型描述: 单选题
What caused the accident and who should take the responsibility ＿＿＿＿＿＿＿＿＿ unknown to all.
A.remain
B.are remained
C.is remained
D.remains
What caused the accident and who should take the responsibility ＿＿＿＿＿＿＿＿＿ unknown to all.
A.remain
B.are remained
C.is remained
D.remains
参考答案：
佳题速递：