问题
选择题
That girl is Susan. She is _____________. [ ]
A. a friend of my sisters
B. a friend my sisters
C. a friend of my sister
D. a friend of my sister's
答案
答案：D
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That girl is Susan. She is _____________. [ ]
A. a friend of my sisters
B. a friend my sisters
C. a friend of my sister
D. a friend of my sister's
答案：D