When I was walking along the street,I met a friend of____

題目：

When I was walking along the street,I met a friend of____
A:my father B :my father's C:my fathers' D:my
選哪個?爲什麼?

解答：

B,it means one of my father's friend,如果表示我的應用mine,of後的詞性應爲名詞性物主代詞,故選B