I’m ___ duty today.I must clean the classroom _____ school.
—I'm free tomorrow. I'm planning to play football. Will you go with me? —I'd love to, ________ I have to finish my report first.
—He has already gone to England. —When________ he________ there?
--- How do you improve your listening skill? --- I often do it ________ tapes and English radios.
--- Are you afraid of the dark? --- Yes, I always go to sleep _________ the light on.
— What a new computer! Can you tell me _________? — Just the day before yesterday.