2012-1996=16（岁），
16÷4=4（个）．
答：到今年，他过了4个生日．
故选：C．
— What do you want to be, Bill?
— I want to be ______ actor. [ ]
A. a
B. an
C. the
D. /
A．mgtgθ
B．mgsinθ
C．μmg
D．μmg
mgtgθ
mgsinθ