I have two brothers, are doctors.
A. both of them
B. both of whom
C. neither of whom
D. each of them
网友回答
A. both of them
(答案→)B. both of whom
C. neither of whom
D. each of them
解析：考查非限制性定语从句。Neither表示否定，谓语用单数，排除C；A、D选项前应该加and，看作并列的两个分句，排除A、D；two brothers是先行词，both of whom“他们两个”，引导非限制性定语从句。故选B。