pen/pencil/ruler/bag — 英语情景题

放学后，Sam 和 Lily 在教室整理文具。请选择合适的单词补全对话。（备选词：pen / pencil / ruler / bag） Sam: This is my (1)________. I can draw a cat with it. Lily: It's nice! Is this your (2)________ too? Sam: Yes, it is. I put my books in it. Lily: Look! My (3)________ is long. I can draw a line with it. Sam: And this is my (4)________. I can write with it. Lily: Great! We are ready for class.