across room还是through room

across room还是through room across the room 还是throngh the room? The waiter shouted the room.空白部分使用through还是across 为什么要用“across the room"而不用"through the room"? swim ( )填across还是through room who was thrown across the room The room measures 5 metres across.. She was thrown across the room. 是dinning room还是dining room? 是clean the room 还是clean room? on the room,还是at the room