The new buyer identified a dozen new sources for the material, ___________ proved to be reliable． A....
2022-12-04 01:22:14 33次 2013-2014学年北京市高三第一学期期中测试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
The new buyer identified a dozen new sources for the
material, ___________ proved to be reliable．
A. most of them B.
most of which C. most of whom D. most
of those
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