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