The old man has three sons，and two _____ are doctors．A．of whichB．of whomC．of the_刷题宝

题干

The old man has three sons，and two _____ are doctors．

A．of which

B．of whom

C．of them

D．of that

上一题下一题 0.85难度单项选择更新时间:2010-09-15 11:20:18

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