Ellen was a painter of birds and of nature， ，for some reason，had withdrawn from all human society.(2012·浙江，17)
A. which
B. who
C. where
D. whom
网友回答
A. which
(答案→)B. who
C. where
D. whom
解析：句意：埃伦是一个专画鸟类和大自然的画家。因为某种原因，她远离了人类社会。此题考查非限制性定语从句，修饰先行词Ellen。因为关系词指人并且在从句中作主语，所以只能用who。