--Do you know the man John Brown?-I only know he is called.A. called howB. called w

问题补充：

--Do you know the man John Brown?

---I only know he is called.

A. called, how

B. called, what

C. who called, how

D. whom called, what

答案：

A. called, how

(答案→)B. called, what

C. who called, how

D. whom called, what

解析：called(=who is called)是过去分词作后置定语。