His stepmother is kind to him,---whom she had a deep love.A.with B.at C.of D.about
问题描述：
His stepmother is kind to him,---whom she had a deep love.
A.with B.at C.of D.about
答
His stepmother is kind to him,-of-whom she had a deep love.
His stepmother is kind to him.
She had (has?) a deep love of him.
==>
His stepmother is kind to him and she had (has?) a deep love of him.
==>
His stepmother is kind to him, of whom she had (has?) a deep love.
答
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.