用方位介词填空

用方位介词填空
（in front of,below,behind,next to,before,opposite,on,over,between,for,under,above,in,inside）
1.Look,the bookshelf is （）the door,when the door is open we can’t see it.
2.The big blackboard is （）the teacher’s desk,so the students can see the words on it.
3.The shopping mall is just （）the bookshop.
4.I know the teaching building is （）the art room.
5.A piece of chalk is （）the window,let me pick it up.
6.The small shelf is （）the bed and a pair of shoes is （）it.