I wish to thank your student Tom, without rescue couldn’t be offered to my drowning boy so soon.
A. whose
B. which
C. whom
D. who
网友回答
A. whose
B. which
(答案→)C. whom
D. who
解析：考查定语从句：先行词是your student Tom，定语从句中介词without缺少宾语，用without whom引导定语从句，句意：我希望谢谢你的学生汤姆，没有他，不能这么快的救援我的溺水的孩子。选C。