-- Is that sister Dave? No it isn’t. She is my friend.A. youB. your C. sheD. herself

问题补充：

-- Is that sister, Dave?

-- No, it isn’t. She is my friend.

A. you

B. your

C. she

D. herself

答案：

A. you

(答案→)B. your

C. she

D. herself

解析：考查代词。句意：代维，那是你的姐姐吗？——不，那不是。她是我的朋友。结合语境可知上文为形容词性物主代词做定语，故选B，你的。