He loves his parents deeply are very kind to him.A. both of themB. both of whoC. whomD.

问题补充：

He loves his parents deeply, are very kind to him.

A. both of them

B. both of who

C. whom

D. both of whom

答案：

A. both of them

B. both of who

C. whom

(答案→)D. both of whom

解析：定语从句考查题。先行词his parents关系词both of whom在从句中做主语。句意：他深爱他的父母，他们对他也非常好。