问题描述：
Look at the old man.He is( )
1 a friend of Jane.
2 a friend of Jane's father.
3 a friend of Jane's father's.
4 a Jane's father's friend.
1 a friend of Jane.
2 a friend of Jane's father.
3 a friend of Jane's father's.
4 a Jane's father's friend.
问题解答：
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