a/an + 文具名词 — 英语情景题

Sam第一天到新学校，Lily帮他认识文具。请选择a或an填空，完成对话。 Sam: Good morning, Lily. Look at my new school things! Lily: Wow! Is this (1)________ pen? Sam: Yes. And this is (2)________ eraser. It is new. Lily: I like your eraser! Do you have (3)________ ruler? Sam: Yes, I do. Look! I also have (4)________ pencil and (5)________ English book. Lily: Great! Let's go to class together.