问题描述：
one friend of his 还是one friend of him,这两个句子哪个是正确的表达方式,
原句是Mary,one friend of ____ ,said to him....
空的地方填什么,在him和his当中选择
原句是Mary,one friend of ____ ,said to him....
空的地方填什么,在him和his当中选择
问题解答：
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