He is a strict but kind-hearted father the children respect but are afraid of.A. /B. tha

问题补充：

He is a strict but kind-hearted father, the children respect but are afraid of.

A. /

B. that

C. for whom

D. one whom

答案：

A. /

B. that

C. for whom

(答案→)D. one whom

解析：考查定语从句。one代指strict but kind-hearted father，在定语从句中作宾语，故用关系词whom，选D。