---I’ve got to go now. ---Must you? I ______ you could stay for dinner with us tonight.
—I don't know ____ or not. —Neither do I.You may ask his teacher.
I didn't know ____.
—What did your father say? —He asked us ____.
—Could you tell me ____? —Sure. Walk straight along this street and you'll find it.
—Philip has gone to New Zealand. —Oh,can you tell me ____?