题目内容
根据句意,选用括号内合适的介词填空
4.There are two trees ______ (behind,on) our classroom.
There is a school ______ (in,next to) my home.
There is a factory ______ (in front of,in) our school.
There are some pens ______ (of,on) my desk.
______ (In,Behind) their classroom,there is a teacher's desk.