( )1. Tom and Jack are brothers. There is ______ uncommon similarity between ______ two boys.
A. an; / B. an; the
C. a; / D. a; the
( )2. (2017天津)—Is this ______ computer?
—Yes, it's______. My mother bought it for me.
A. you; me B. your; my
C. yours; mine D. your; mine