—What’s favorite subject?—My favorite subject is math.
Can you tell me ________ ?
--- ________ did your uncle leave his home town?. --- Let me see. He _______ for nearly twenty years.
--- My father’s new cellphone can be used ______ e-mails. --- Is he used _____ on such a small screen?
--- ________ is the theme park? --- It’s about half an hour’s bus ride.
--- Did you notice him come into the hall? --- Sorry, sir. I _______ with my friends online.