You may arrive in Beijing early _____ you mind taking the night train.
I first met Lisa three years ago. She _____ at a radio shop at that time.
I don’t work here; I _____ until a new secretary arrives.
—I’m sorry to keep you waiting. —Oh, not at all. I _____ here only a few minutes.
—Who is Clarke? —_____ him yet? I saw you shaking hands with him at the meeting.
—_____ my glasses? —Yes, I saw them on your desk a minute ago.