用所给的词填空。 1.--_______is my doll? --It's in the box. 2.--What colour is your bag? --It___________red. 3.--Is this your eraser? --Yes, it is_____eraser. 4.--Where is his book? --It's__________the desk. 5.--I'm not_______at English? --I can help you. 6.--Is________with Mr White? --Yes, she is.