He has two sons, are doctors. [ ] A．two of whomB．both of whom C．all of themD．eac
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He has two sons, ________are doctors.
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A．two of whomB．both of whomC．all of themD．each of them
试题答案
答案：B
解析：此句若无连词and即为非限制性的定语从句，又因有两个孩子，故用B。 |