句型Where is...? It's in/on/under... — 英语填空题
题目
看情境，选词填空（in / on / under）。小明的橡皮在椅子下面，他问同学：A: Where is my eraser? B: It's ___ the chair. 小明的书在书包里面：A: Where is my book? B: It's ___ my bag. 铅笔盒在桌子上：A: Where is my pencil box? B: It's ___ the desk.