The new buyer identified a dozen new sources for the material, ___________ prove

题干

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

上一题下一题 0.64难度单项选择更新时间:2014-01-09 10:19:20

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