She has many good friends, ________ are really kind to her and her parents．

A.most of them

B.but most of them

C.and most of whom

D.most of whom

答案及解析： D

解析：

有but或and之类的连接词时，两个句子是并列关系，不能用关系代词whom，但B选项错误的原因是这两句话不是转折关系，所以不能用but。