–David, is that _____ English teacher?
--Yes, he is ___. He is very caring.
A:yours; ours
B:your; our
C:yours; our
D:your; ours
下列各组句子中,划线字的意义和用法完全相同的一项是 ( )
方程x2﹣9=0的根为( )
He was ____ (homeless/homelessness), so we took him in.