điền vào chỗ trống :teacher, engineer, that, job, who .
a: (1)...............is this ?
b: this is my mother.
a: what 's her (2).................?
b: she's a (3)......................
a:is (4).................. your father ?
b: yes.he's an (5)....................
She is an engineer
She is an enginneer