Eleven people got killed in the accident, the identities haven't been available.
A. whose
B. of whom
C. to whom
D. with whom
网友回答
A. whose
(答案→)B. of whom
C. to whom
D. with whom
解析：B 考察定语从句。The identities与eleven people逻辑上构成所属关系，使用介词of+whom引导定语从句，修饰先行词eleven people，故B正确。