No one knows when the house was built , but it must be very old. A.suddenly B.gradually C.exactly D....
2022-05-04 13:53:15 139次 2020年6月内蒙古包头市升学考试调研英语试卷（二） 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
No one knows when the house was built , but it must be very old.
A.suddenly B.gradually C.exactly D.recently
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