A: I once heard someone shout, "Look out." I put my heard out of the window and a bucketful water fell on me. It seems that "Look out" may mean "Don't look out". B: I was once on a ship and heard the captain shout, "All hands on deck ." I put my hands on the deck and someone walked on them. C: I once called early on an English friend and the servant who came to the door said, "He's not up yet. Come back in half an hour." When I went again for him, she said, "He's not down yet." I said, "If he's neither up nor down. Where is he?" . "He is not up" and "He is not down" in the dialogue actually means       _  .
He doesn't stand up and doesn't lie down He doesn't come up and doesn't go down He hasn't turned up and hasn't turned down He hasn't got up and he hasn't come downstairs