This is _____________ family.[ ]
A. me
B. I
C. my
答案：C
—Tom, I’m watching a football match．What about you?
—_________
A．So do I．
B．So am I．
C．So I do.
D．So I am.
A．mgtgθ
B．mgsinθ
C．μmg
D．μmg
mgtgθ
mgsinθ