情景会话，选择正确答案。
Bob：Look, Tim! That is my mother.
Tim：____1____
Bob：She is a TV reporter.
Tim：Oh! ____2____
Bob：No, he isn't. ____3____
Tim：How interesting! ____4____
Bob：Yes.
Where ________ your mother work?
A. doesB. doC. did
A vet is ________ animal doctor.
A. aB. anC. /
What ________ your dad?
A. areB. amC. is
Where are you ________?
A. fromB. comeC. come from