When last ______ valuable, those books enjoyed great success. A. finding B. found C. being found D....
2023-02-01 21:20:38 140次 2012届黑龙江省高二上学期期末考试英语卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
When last ______ valuable, those books
enjoyed great success.
A.
finding B.
found C. being
found D. to be found
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