问题补充：
I met a friend when I went to the shopping center for some fruits.
A. of my father
B. of my father’s
C. of my
D. of me
答案：
A. of my father
(答案→)B. of my father’s
C. of my
D. of me
解析：此题考查双重所有格:of+名词所有格或名词性物主代词。名词或名词性物主代词和冠词、指示代词等修饰同一名词时，因为它们不能都放在该名词的前面，就使用双重所有格的形式。如:that book of Tom’s/his/hers；a few friends of Mr. Green’s/mine。
