---He’s already back to Australia,___________?---________, he is on a visit to Shanghai.
I saw him ______ the game on the computer yesterday evening.
If you eat ________ junk food, you will become overweight .
He has lost his pen. He is _______ it everywhere.
My mother told me _______ junk food at school.
There 's a teacher _____ with your parents in the teachers' office.