用合适的介词和介词词组填空.

用合适的介词和介词词组填空.
The shop is () the right () the zoo.
The libeary is () the middle of our school.
Don't walk () the grass.
I want to sit () you.
The teacher'desk is () () () () the classroom.
My classmates are polite.(对划线部分提问）（划线部分是polite）
（）are you classmates ()?