方位介词in/on/under等 — 英语选择题
题目
In the school library, a blue pencil is in a pencil case. The pencil case is under a chair, and a schoolbag is on the chair. Which sentence is correct? A. The pencil is on the chair. B. The pencil case is under the chair. C. The schoolbag is in the chair. D. The pencil is under the schoolbag.