The old man has four sons, and two turned doctors．A．of whichB．of whomC．of themD．
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The old man has four sons, and two _____ turned doctors．
| A．of which | B．of whom | C．of them | D．of that |
试题答案
C
解析
The old man has four sons, and two _____ turned doctors．
| A．of which | B．of whom | C．of them | D．of that |
C
解析