问题补充：
--- Excuse me, is this new computer?
--- Yes, it’s .
A. your; my
B. your; mine
C. yours; my
D. yours; mine
答案：
A. your; my
(答案→)B. your; mine
C. yours; my
D. yours; mine
解析：形容词性物主代用语名词前作定语,名词性物主代词可用语动词后做宾语,表语,your、 my为形容词性物主代，yours、mine为名词性物主代词，故选B.
