His stepmother is kind to him,---whom she had a deep love.

问题描述:

His stepmother is kind to him,---whom she had a deep love.
A.with B.at C.of D.about

选C
whom 是受格(object pronoun),在句子中作及物动词的宾语(object)或介词的宾语.
此处及物动词的宾语为him.
have deep love of 习惯用语 固定搭配
解释为深深地爱着...
这句话的意思是:他的继母对他很好,深深地爱着他.