方位介词：in, on, under, near — 英语填空题
题目
从 in, on, under, near 中选词填空，每词限用一次。1. The teacher's desk is ___ the blackboard. 2. My English book is ___ the desk. 3. The chairs are ___ the classroom. 4. The ball is ___ the chair, so you can't see it from the front.